WorldWideScience

Sample records for group 0-4 years

  1. Canadian Sedentary Behaviour Guidelines for the Early Years (aged 0-4 years).

    Science.gov (United States)

    Tremblay, Mark S; Leblanc, Allana G; Carson, Valerie; Choquette, Louise; Connor Gorber, Sarah; Dillman, Carrie; Duggan, Mary; Gordon, Mary Jane; Hicks, Audrey; Janssen, Ian; Kho, Michelle E; Latimer-Cheung, Amy E; Leblanc, Claire; Murumets, Kelly; Okely, Anthony D; Reilly, John J; Stearns, Jodie A; Timmons, Brian W; Spence, John C

    2012-04-01

    The Canadian Society for Exercise Physiology (CSEP), with assistance from multiple partners, stakeholders, and researchers, developed the first Canadian Sedentary Behaviour Guidelines for the Early Years (aged 0-4 years). These national guidelines are in response to a call from health and health care professionals, child care providers, and fitness practitioners for guidance on sedentary behaviour in the early years. The guideline development process followed the Appraisal of Guidelines for Research Evaluation (AGREE) II framework. The recommendations are informed by evidence from a systematic review that examined the relationships between sedentary behaviour (predominantly screen time) and health indicators (healthy body weight, bone and skeletal health, motor skill development, psychosocial health, cognitive development, and cardio-metabolic disease risk factors) for three age groups (infants aged 900 domestic and international stakeholders, end-users, and key informants. The final guidelines state: for healthy growth and development, caregivers should minimize the time infants (aged spend being sedentary during waking hours. This includes prolonged sitting or being restrained (e.g., stroller, high chair) for more than 1 h at a time. For those under 2 years, screen time (e.g., TV, computer, electronic games) is not recommended. For children 2-4 years, screen time should be limited to under 1 h per day; less is better.

  2. Switching Between Antibiotics Among Danish Children 0-4 Years of Age

    DEFF Research Database (Denmark)

    Reilev, Mette; Thomsen, Reimar W; Aabenhus, Rune

    2018-01-01

    BACKGROUND: In Denmark, the use of amoxicillin is widespread among children, despite phenoxymethylpenicillin being recommended as first-line therapy. The reason for this apparent discrepancy is not fully understood. We aimed at evaluating prescribing patterns of antibiotics among Danish children...... aged 0-4 years, with emphasis on incidence of treatment episodes, choice of initial antibiotic treatment and switching patterns between different types of antibiotics. METHODS: We identified all children ≤4 years who filled a prescription of antibiotics from 2000-2015 according to the nationwide Danish...... National Prescription Registry. We estimated the incidence rate of episodes treated with antibiotics and the choice of initial antibiotic treatment over time. Further, we assessed the cumulative risk of switching within 0-3 days after initiating therapy. RESULTS: We identified 3,481,684 antibiotic...

  3. Incidence of death from congenital toxoplasmosis in 0-4-year-old children in Japan.

    Science.gov (United States)

    Hoshino, Tatsuji; Kita, Masato; Imai, Yukihiro; Yamakawa, Masaru

    2014-08-01

    Congenital toxoplasmosis is caused by Toxoplasma gondii. The incidence of death due to congenital toxoplasmosis in Japan from 1974 to 2007 was calculated using the autopsy database of the Japanese Society of Pathology and vital statistics from the Ministry of Health, Labour and Welfare. Two neonatal deaths due to congenital toxoplasmosis were reported during that time. As there were 161,195 neonatal deaths during this period and 32,465 autopsies were performed, the yearly neonatal death from congenital toxoplasmosis was calculated as 2 × 161,195/32,465/34 = 0.29 and the autopsy rate as 32,465/161,195 = 0.2014 (20.14%). The calculated number of annual deaths in infants was 0.82 and in children aged 1-4 years it was 2.09; thus, although few, deaths from congenital toxoplasmosis do still occur in neonates, infants, and young children. Therefore, obstetricians and pediatricians should be aware of the potential for congenital toxoplasmosis, and pregnant women should make every effort to avoid T. gondii infection. © 2014 Japan Pediatric Society.

  4. Canadian 24-Hour Movement Guidelines for the Early Years (0-4 years): An Integration of Physical Activity, Sedentary Behaviour, and Sleep.

    Science.gov (United States)

    Tremblay, Mark S; Chaput, Jean-Philippe; Adamo, Kristi B; Aubert, Salomé; Barnes, Joel D; Choquette, Louise; Duggan, Mary; Faulkner, Guy; Goldfield, Gary S; Gray, Casey E; Gruber, Reut; Janson, Katherine; Janssen, Ian; Janssen, Xanne; Jaramillo Garcia, Alejandra; Kuzik, Nicholas; LeBlanc, Claire; MacLean, Joanna; Okely, Anthony D; Poitras, Veronica J; Rayner, Mary-Ellen; Reilly, John J; Sampson, Margaret; Spence, John C; Timmons, Brian W; Carson, Valerie

    2017-11-20

    The Canadian Society for Exercise Physiology convened representatives of national organizations, research experts, methodologists, stakeholders, and end-users who followed rigorous and transparent guideline development procedures to create the Canadian 24-Hour Movement Guidelines for the Early Years (0-4 years): An Integration of Physical Activity, Sedentary Behaviour, and Sleep. These novel guidelines for children of the early years embrace the natural and intuitive integration of movement behaviours across the whole day (24-h period). The development process was guided by the Appraisal of Guidelines for Research and Evaluation (AGREE) II instrument. Four systematic reviews (physical activity, sedentary behaviour, sleep, combined behaviours) examining the relationships within and among movement behaviours and several health indicators were completed and interpreted by a Guideline Development Panel. The systematic reviews that were conducted to inform the development of the guidelines, and the framework that was applied to develop the recommendations, followed the Grading of Recommendations Assessment, Development, and Evaluation (GRADE) methodology. Complementary compositional analyses were performed using data from the Canadian Health Measures Survey to examine the relationships between movement behaviours and indicators of adiposity. A review of the evidence on the cost effectiveness and resource use associated with the implementation of the proposed guidelines was also undertaken. A stakeholder survey (n = 546), 10 key informant interviews, and 14 focus groups (n = 92 participants) were completed to gather feedback on draft guidelines and their dissemination. The guidelines provide evidence-informed recommendations as to the combinations of light-, moderate- and vigorous-intensity physical activity, sedentary behaviours, and sleep that infants (guidelines. These guidelines represent a sensible evolution of public health guidelines whereby optimal health is

  5. The dynamical groups SO0(3.2) and SO0(4.2) as space-time groups of elementary particles

    International Nuclear Information System (INIS)

    Heidenreich, W.

    1981-01-01

    Elementary particles are described by representations of SO 0 (4.2) and SO 0 (3.2). An S-matrix invariant under the corresponding group constrains the possible scattering channels. The simptest used representations have each one gauge freedom, the physical significance of which is discussed. 'Higher' representations can be constructed from the simplest by means of the tensor product; the same is true for the corresponding particles. The simplest objects of the SO 0 (3.2) theory, the SO 0 (3.2) theory, the Dirac singletons correspond to the states of a 2-dimensional harmonic oscillator. The basic states of this are interpreted as urs in the sense of von Weizsaecker. (orig./HSI) [de

  6. Falls, cuts and burns in children 0-4 years of age: 2004 Pelotas (Brazil) birth cohort.

    Science.gov (United States)

    Barcelos, Raquel Siqueira; Santos, Iná S; Matijasevich, Alicia; Barros, Aluísio J D; Barros, Fernando C; França, Giovanny Vinicius Araújo; Silva, Vera Lúcia Schmidt da

    2017-03-09

    Knowledge on the incidence of childhood accidents according to the child's stage of development is important for designing preventive programs targeting each age bracket. The aim of this study was to describe the incidence of falls, cuts, and burns in children up to four years of age according to family economic status and maternal age and schooling, in children from the 2004 Pelotas (Brazil) birth cohort. We calculated the incidence rates and incidence rates ratios for the 0-12, 12-24, and 24-48- months of age. Falls were the most frequently reported accidents in all the age brackets, followed by cuts and burns. Boys suffered more falls and cuts than girls in the first two years of life. In the second year of life, the incidence of falls and burns practically tripled, while cuts nearly doubled when compared to the first year, in both sexes. Burns were equally frequent in girls and boys in all three age brackets. The incidence of falls and cuts was higher in boys. In both sexes, having an adolescent mother was associated with falls and cuts in all three age brackets; low maternal schooling was associated with burns and cuts at 48 months; and low family socioeconomic status was associated with falls and cuts at 48 months.

  7. Systematic review of the relationships between physical activity and health indicators in the early years (0-4 years

    Directory of Open Access Journals (Sweden)

    Valerie Carson

    2017-11-01

    Full Text Available Abstract Background Given the rapid development during the early years (0-4 years, an understanding of the health implications of physical activity is needed. The purpose of this systematic review was to examine the relationships between objectively and subjectively measured physical activity and health indicators in the early years. Methods Electronic databases were originally searched in April, 2016. Included studies needed to be peer-reviewed, written in English or French, and meet a priori study criteria. The population was apparently healthy children aged 1 month to 59.99 months/4.99 years. The intervention/exposure was objectively and subjectively measured physical activity. The comparator was various volumes, durations, frequencies, patterns, types, and intensities of physical activity. The outcomes were health indicators ranked as critical (adiposity, motor development, psychosocial health, cognitive development, fitness and important (bone and skeletal health, cardiometabolic health, and risks/harm. The Grading of Recommendations Assessment, Development, and Evaluation (GRADE framework was used to assess the quality of evidence for each health indicator by each study design. Results Ninety-six studies representing 71,291 unique participants from 36 countries were included. Physical activity interventions were consistently (>60% of studies associated with improved motor and cognitive development, and psychosocial and cardiometabolic health. Across observational studies, physical activity was consistently associated with favourable motor development, fitness, and bone and skeletal health. For intensity, light- and moderate-intensity physical activity were not consistently associated with any health indicators, whereas moderate- to vigorous-intensity, vigorous-intensity, and total physical activity were consistently favourably associated with multiple health indicators. Across study designs, consistent favourable associations with

  8. Leading causes of injury hospitalisation in children aged 0-4 years in New South Wales by injury submechanism: a brief profile by age and sex.

    Science.gov (United States)

    Schmertmann, Marcia; Williamson, Ann; Black, Deborah

    2012-11-01

    To identify the leading causes of injury in children aged 0-4 years by single year of age using injury submechanisms and present a brief epidemiologic profile of each cause. Hospitalisation data for New South Wales from 1999 to 2009 were used to identify the leading causes of injury for children aged 0-4 years by single year of age. For each leading cause, rates over time and by sex were calculated by single year of age. Associated age and sex risk ratios were estimated. The leading causes of injury for children aged leading injury cause exhibited an age pattern that remained stable over time and by sex. Age predicted falls while being carried and both age and sex predicted the remaining leading injury causes, with age and sex interacting to predict burns by hot non-aqueous substances. Epidemiologic analysis using single-year age intervals and injury submechanisms results in a clearer picture of injury risk for young children. The findings of this study provide detailed information regarding the leading causes of hospitalised injury in young children by age and sex. Child health-care providers can use this information to focus discussions of child development and injury risk with families of young children and suggest appropriate prevention measures in terms of a child's age and sex. © 2012 The Authors. Journal of Paediatrics and Child Health © 2012 Paediatrics and Child Health Division (Royal Australasian College of Physicians).

  9. Canadian 24-hour movement guidelines for the early years (0-4 years): exploring the perceptions of stakeholders and end users regarding their acceptability, barriers to uptake, and dissemination.

    Science.gov (United States)

    Riazi, Negin; Ramanathan, Subha; O'Neill, Meghan; Tremblay, Mark S; Faulkner, Guy

    2017-11-20

    It is important to engage stakeholders and end users in the development of guidelines for knowledge translation purposes. The aim of this study was to examine stakeholders' (experts in pediatric and family medicine, physical activity knowledge translation, and research) and end users' (parents and early childhood educators) perceptions of the Canadian 24-Hour Movement Guidelines for the Early Years (0-4 years). Stakeholders (n = 10) engaged in telephone interviews and end users (n = 92) participated in focus groups (n = 14) to discuss perceived clarity and need for the guidelines, potential barriers to implementation, identification of credible messengers, and methods for dissemination of the guidelines. A thematic analysis was conducted. The proposed guidelines were very well received by both stakeholders and end users. A clear need for such guidelines was identified, and most believed the guidelines were achievable. Stakeholders and end users identified several potential barriers to uptake, including low awareness of current guidelines; 'daily challenges' such as allure of screen time, lack of time, and competing priorities; and challenges in the context of shifting social norms. A range of methods and messengers of dissemination were identified. Medical and child care settings were the most frequently cited places for dissemination, and physicians and early childhood educators were the most common suggestions for messengers. There was consistent support for the Canadian 24-Hour Movement Guidelines for the Early Years (0-4 years) from both stakeholders and end users. Moving forward, it is important to dedicate appropriate support and funding toward dissemination efforts in order to reach end users, particularly parents and early childhood educators.

  10. Social exclusion, deprivation and child health: a spatial analysis of ambulatory care sensitive conditions in children aged 0-4 years in Victoria, Australia.

    Science.gov (United States)

    Butler, Danielle C; Thurecht, Linc; Brown, Laurie; Konings, Paul

    2013-10-01

    Recent Australian policy initiatives regarding primary health care focus on planning services around community needs and delivering these at the local area. As in many other countries, there has also been a growing concern over social inequities in health outcomes. The aims of the analysis presented here were firstly to describe small area variations in hospital admissions for ambulatory care sensitive conditions (ACSC) among children aged 0-4 years between 2003 and 2009 in the state of Victoria, Australia, and secondly to explore the relationship of ACSC hospitalisations with socio-economic disadvantage using a comparative analysis of the Child Social Exclusion (CSE) index and the Composite Score of Deprivation (CSD). This is a cross sectional secondary data analysis, with data sourced from 2003 to 2009 ACSC data from the Victorian State Government Department of Health; the Australian Standard Geographical Classification of remoteness; the Australian 2006 Census of Population and Housing; and AMPCo General Practitioner data from 2010. The relationship between the indexes and child health outcomes was examined through bivariate analysis and visually through a series of maps. The results show there is significant variation in the geographical distribution of the relationship between ACSCs and socio-economic disadvantage, with both indexes capturing important social gradients in child health conditions. However, measures of access, such as geographical accessibility and workforce supply, detect additional small area variation in child health outcomes. This research has important implications for future primary health care policy and planning of services, as these findings confirm that not all areas are the same in terms of health outcomes, and there may be benefit in tailoring mechanisms for identifying areas of need depending on the outcome intended to be affected. Copyright © 2013 Elsevier Ltd. All rights reserved.

  11. Denver Developmental Test Findings and their Relationship with Sociodemographic Variables in a Large Community Sample of 0-4-Year-Old Children.

    Science.gov (United States)

    Çelikkiran, Seyhan; Bozkurt, Hasan; Coşkun, Murat

    2015-06-01

    The aim of this study was to investigate the prevalence of developmental problems and relationship with sociodemographic variables in a community sample of young children. Participants included 1000 children (558 males, 442 females, age range 1-48 months, mean 18.4 months, SD 7.8 months). Children were referred generally by their parents for developmental evaluation and consultation in response to a public announcement in a district area in Istanbul, Turkey. An interview form and the Denver Developmental Screening Test II (DDST) were used for sociodemographic data and developmental evaluation. The χ 2 test and Pearson's correlation test were used for data analysis. Seven hundred forty-one out of 1000 children (74.1%) had normal, 140 (14%) had risky, and 119 (11.9%) had abnormal findings on the DDST results. The probability of abnormal findings on the DDST results was significantly higher in males (p=0.003), the 2-4-year-old group (pone child (p=0.001), consanguineous marriages (p0.05). Sociodemographic factors have a noteworthy impact on development. Determining these factors is important especially during the first years of life.

  12. Stunting coexisting with overweight in 2·0-4·9-year-old Indonesian children: prevalence, trends and associated risk factors from repeated cross-sectional surveys.

    Science.gov (United States)

    Rachmi, Cut Novianti; Agho, Kingsley Emwinyore; Li, Mu; Baur, Louise Alison

    2016-10-01

    The persistence of undernutrition, along with overweight and obesity, constitute the double burden of malnutrition. The present study aimed to: (i) describe the prevalence and trends of concurrent stunting and overweight in Indonesian children; (ii) identify potentially associated risk factors; and (iii) determine whether stunted children are at greater risk of overweight compared with those of healthy height. A secondary data analysis of children aged 2·0-4·9 years in four cross-sectional studies of the Indonesian Family Life Survey. Children's height and BMI Z-scores were calculated based on the WHO Child Growth Standards (2006). We defined 'concurrent stunting and overweight' as height-for-age Z-score +1. Multivariate generalised linear latent and mixed models were used to determine associated risk factors. Thirteen out of twenty-seven provinces in Indonesia. Children (n 4101) from four waves of the Indonesian Family Life Survey (1993-2007). There were inconsistent trends in the prevalence of concurrent stunting and overweight from waves 1 to 4. Children were more likely to be stunted and overweight when they were in the youngest age group (2·0-2·9 years), were weaned after the age of 6 months, had short-statured mothers or lived in rural areas. Stunted children were significantly more likely to be overweight than healthy-height children (OR>1) but did not differ significantly different across each wave (OR=1·34-2·01). Concurrent stunting and overweight occurs in Indonesian children aged 2·0-4·9 years. Current policies and programmes need to be tailored for the management of this phenomenon.

  13. Overview of Total Group financial year

    International Nuclear Information System (INIS)

    Anon.

    2003-01-01

    In 2004, the combination of very high crude oil prices with a strong rise of refining margins, and in the second half of 2004 of the start off again of the rise of petrochemical margins, has led Total Group to reach a record level of 9.04 billion euros for its net adjusted result, which represents a 23% rise with respect to 2003, and this despite a fall of the Dollar exchange rate. Total has also carried on its downstream strategy of natural gas production. This strategy aims at facilitating and optimizing the access to its present day and future productions and reserves, not only to traditional markets but also to markets opened to world competition. (J.S.)

  14. New silicate-germanate Cs2Pb2[(Si0.6Ge0.4)2O7] from the series A2Pb2[B2O7], A = K, Cs, B = Si, Ge with the umbrella-like [PbO3]4- group

    Science.gov (United States)

    Belokoneva, Elena L.; Morozov, Ivan A.; Volkov, Anatoly S.; Dimitrova, Olga V.; Stefanovich, Sergey Yu.

    2018-04-01

    New silicate-germanate Cs2Pb2[(Si0.6Ge0.4)2O7] was synthesized in multi-components hydrothermal solution with 20 w.% concentration of Cs2CO3 mineralizer, pH = 10. Novel mixed compound belongs to the structure type A2Pb2[B2O7] previously indicated for powders with A = K, B=Si or Ge. Singe crystal structure determination of Cs2Pb2[(Si0.6Ge0.4)2O7] revealed the need for the correction of the space group of the earlier suggested structural model from P-3 to P-3m1, as well as for the splitting of the Pb-atom position. Umbrella-like groups [PbO3]4- are located between [(Si,Ge)O4]4- tetrahedra in mica-like honeycomb layers and play the role of tetrahedra with the Pb-lone-pair as the forth apex. Crystal chemical comparison revealed similarities and differences with the classical structure type of α-celsian Ba[Al2Si2O8] with the tetrahedral double layer. Recently investigated nonlinear optical acentric borates Pb2(BO3)(NO3) and Pb2(BO3)Cl are both related to this structural type, possessing umbrella-like groups [PbO3]4- and honeycomb layers [Pb2(BO3)]+ with the BO3-triangles on the tetrahedral positions.

  15. Group Counseling with United States Racial Minority Groups: A 25-Year Content Analysis

    Science.gov (United States)

    Stark-Rose, Rose M.; Livingston-Sacin, Tina M.; Merchant, Niloufer; Finley, Amanda C.

    2012-01-01

    A 25-year content analysis was conducted of published group work articles that focused on 5 racial groups (African American, Asian American/Pacific Islander, Latino/a, Native American, and Intercultural group). Articles were included if they described an intervention or conceptual model with 1 of the racial groups. The analysis revealed 15 content…

  16. NPPs of CEZ in 2005 year of CEZ group improvement

    International Nuclear Information System (INIS)

    Linhart, Z.

    2006-01-01

    In this presentation author deals with NPPs of CEZ, a.s. group in 2005 year. Structure of the CEZ, a.s., electricity production in NPP Temelin and NPP Dukovany and other exploitation data are presented.

  17. Is hydroxyethyl starch 130/0.4 safe?

    DEFF Research Database (Denmark)

    Haase, Nicolai; Perner, Anders

    2012-01-01

    ABSTRACT: It is heavily debated whether or not treatment with hydroxyethyl starch 130/0.4 contributes to the development of acute kidney failure in patients with severe sepsis. In the previous issue of Critical Care, Muller and colleagues report no association between initial resuscitation...... with hydroxyethyl starch 130/0.4 and renal impairment in a cohort of septic patients. Can we then consider hydroxyethyl starch 130/0.4 a safe intervention? The answer is no - observational data should be interpreted with caution and should mainly be used to identify risks, while safety must be assessed...

  18. The OMERACT Ultrasound Working Group 10 Years On

    DEFF Research Database (Denmark)

    Bruyn, George A; Naredo, Esperanza; Iagnocco, Annamaria

    2015-01-01

    Musculoskeletal ultrasound (US) now thrives as an established imaging modality for the investigation and management of chronic inflammatory arthritis. We summarize here results of the Outcome Measures in Rheumatology (OMERACT) US working group (WG) projects of the last 2 years. These results were...

  19. Activity report of the Neutrino Research Group. Year 2006

    International Nuclear Information System (INIS)

    2007-01-01

    For the last two decades, neutrino physics has been producing major discoveries including neutrino oscillations. These results gave clear confirmation that active neutrinos oscillate and therefore have mass with three different mass states. This is a very important result showing that the Minimal Standard Model is incomplete and requires an extension which is not yet known. The neutrino research field is very broad and active, at the frontier of today's particle physics. The Neutrino Research Group (GDR) was created in January 2005 with the aim of gathering CEA and CNRS research teams working on Neutrino Physics on experimental or theoretical level. This document is the 2006 activity report of the research group, two years after its creation. It presents the results of the 5 working groups: 1 - Determination of neutrino parameters; 2 - Physics beyond the standard model; 3 - Neutrinos in the universe; 4 - Accelerators, detection means, R and D and valorisation; 5 - Common tools to all working groups. The proposed neutrino physics road-map and the actual and future short-, medium- and long-term projects are presented in appendixes. The Neutrino research group organization, the Memphys specific mission group, the research group participating laboratories and teams, as well as the Memphys project are presented too

  20. Activity report of the Neutrino Research Group. Year 2010

    International Nuclear Information System (INIS)

    2011-01-01

    For the last two decades, neutrino physics has been producing major discoveries including neutrino oscillations. These results gave clear confirmation that active neutrinos oscillate and therefore have mass with three different mass states. This is a very important result showing that the Minimal Standard Model is incomplete and requires an extension which is not yet known. The neutrino research field is very broad and active, at the frontier of today's particle physics. The Neutrino Research Group (GDR) was created in January 2005 with the aim of gathering CEA and CNRS research teams working on Neutrino Physics on experimental or theoretical level. This document is the 2010 activity report of the research group, six years after its creation. It presents the results of the 5 working groups: 1 - Determination of neutrino parameters; 2 - Physics beyond the standard model; 3 - Neutrinos in the universe; 4 - Accelerators, detection means, R and D and valorisation; 5 - Common tools to all working groups. The proposed neutrino physics road-map and the actual and future short-, medium- and long-term projects are presented in appendixes

  1. Twining genera of (0,4) supersymmetric sigma models on K3

    International Nuclear Information System (INIS)

    Harrison, Sarah; Kachru, Shamit; Paquette, Natalie M.

    2014-01-01

    Conformal field theories with (0,4) worldsheet supersymmetry and K3 target can be used to compactify the E 8 ×E 8 heterotic string to six dimensions in a supersymmetric manner. The data specifying such a model includes an appropriate configuration of 24 gauge instantons in the E 8 ×E 8 gauge group to satisfy the constraints of anomaly cancellation. In this note, we compute twining genera — elliptic genera with appropriate insertions of discrete symmetry generators in the trace — for (0,4) theories with various instanton embeddings. We do this by constructing linear sigma models which flow to the desired conformal field theories, and using the techniques of localization. We present several examples of such twining genera which are consistent with a moonshine relating these (0,4) models to the finite simple sporadic group M 24

  2. Southern hardwood forestry group going strong after 50 years

    Science.gov (United States)

    Brian Roy Lockhart; Steve Meadows; Jeff Portwood

    2005-01-01

    On November 15,200 1, the Southern Hardwood Forestry Group (referred to as the Group) met at the U.S. Forest Service Southern Research Station's Southern Hardwoods Laboratory in Stoneville, hlississippi to celebrate the Group's 50th anniversary. About 130 members and guests attended to celebrate the 50th anniversary of the Group and to honor its charter...

  3. High Energy Physics Group. Annual progress report, fiscal year 1983

    International Nuclear Information System (INIS)

    1983-01-01

    Perhaps the most significant progress during the past twelve months of the Hawaii experimental program, aside from publication of results of earlier work, has been the favorable outcome of several important proposals in which a substantial fraction of our group is involved: the Mark II detector as first-up at the SLC, and DUMAND's Stage I approval, both by DOE review panels. When added to Fermilab approval of two neutrino bubble-chamber experiments at the Tevatron, E632 and E646, the major part of the Hawaii experimental program for the next few years is now well determined. Noteworthy in the SLAC/SLC/Mark II effort is the progress made in developing silicon microstrip detectors with microchip readout. Results from the IMB(H) proton decay experiment at the Morton Salt Mine, although not detecting proton decay, set the best lower limit on the proton's lifetime. Similarly the Very High Energy Gamma Ray project is closely linked with DUMAND, at least in principle, since these gammas are expected to arise from pi-zero decay, while the neutrinos come from charged meson decay. Some signal has been seen from Cygnus X-3, and other candidates are being explored. Preparations for upgrading the Fermilab 15' Bubble Chamber have made substantial progress. Sections of the Progress Report are devoted to VAX computer system improvements, other hardware and software improvements, travel in support of physics experiments, publications and other public reports, and last analysis of data still being gleaned from experimental data taken in years past (PEP-14 and E546, E388). High energy physics theoretical research is briefly described

  4. Trends in asthma mortality in the 0- to 4-year and 5- to 34-year age groups in Brazil.

    Science.gov (United States)

    Graudenz, Gustavo Silveira; Carneiro, Dominique Piacenti; Vieira, Rodolfo de Paula

    2017-01-01

    To provide an update on trends in asthma mortality in Brazil for two age groups: 0-4 years and 5-34 years. Data on mortality from asthma, as defined in the International Classification of Diseases, were obtained for the 1980-2014 period from the Mortality Database maintained by the Information Technology Department of the Brazilian Unified Health Care System. To analyze time trends in standardized asthma mortality rates, we conducted an ecological time-series study, using regression models for the 0- to 4-year and 5- to 34-year age groups. There was a linear trend toward a decrease in asthma mortality in both age groups, whereas there was a third-order polynomial fit in the general population. Although asthma mortality showed a consistent, linear decrease in individuals ≤ 34 years of age, the rate of decline was greater in the 0- to 4-year age group. The 5- to 34-year group also showed a linear decline in mortality, and the rate of that decline increased after the year 2004, when treatment with inhaled corticosteroids became more widely available. The linear decrease in asthma mortality found in both age groups contrasts with the nonlinear trend observed in the general population of Brazil. The introduction of inhaled corticosteroid use through public policies to control asthma coincided with a significant decrease in asthma mortality rates in both subsets of individuals over 5 years of age. The causes of this decline in asthma-related mortality in younger age groups continue to constitute a matter of debate. Apresentar uma atualização das tendências da mortalidade da asma no Brasil em duas faixas etárias: 0-4 anos e 5-34 anos. Dados relativos ao período de 1980 a 2014 referentes à mortalidade da asma, conforme se definiu na Classificação Internacional de Doenças, foram extraídos Sistema de Informação sobre Mortalidade do Departamento de Tecnologia da Informação do Sistema Único de Saúde. Para analisar as tendências temporais das taxas

  5. Backwards and Forwards: 50 years of the Education Group

    Science.gov (United States)

    2000-01-01

    The Education Group of the Institute of Physics celebrated its 50th anniversary by dedicating its annual 16 - 19 Day to a conference entitled Post-16 Physics: Looking forward, learning from the past. This attracted an audience of 50 or so nostalgia-seekers on Saturday 13 November at the Portland Place HQ. Philip Britton (Chair of the Education Group) began the proceedings in his usual pawky way by challenging members to identify the year in which some hardy topics were first addressed. A key trend in titles was the movement from problem to challenge . He looked forward to the time when success was a keynote word. Few identified Physics in Industry with the year of the deepest recession of the Thatcher Era. Tim Akrill (Chief A-level Physics Examiner for Edexcel) reminded us that A-levels were just about as old as the Education Group before taking us on an informative and entertaining tour of Assessment and Examinations through the Ages . Things have indeed become more complex since the very first written examination of 6th century China, when the only question, set every year, was: `Write down everything you know'. In 1951 an A-level physics paper gave a choice of six out of twelve questions and appeared in an A5 booklet of perhaps as many as four pages. The satisfying thump of a kilogram mass of current Edexcel A-level physics papers resounded through the room as he dropped them on a table. In those innocent days all questions followed the DDC format: define, describe, calculate . `Question spotting' was an art (or science) assiduously developed by teachers, as Lees' Disk alternated with Searle's Bar with less than exciting regularity. Have standards fallen? He thought not. At Edexcel they still get about 4000 candidates getting the higher grades, a number that has stayed the same for some 20 years. He singled out Nuffield Advanced Physics as being responsible for the greatest innovations in exam style since, well, the Chinese really. Styles such as Practical

  6. 25 Years of Quantum Groups: from Definition to Classification

    Directory of Open Access Journals (Sweden)

    A. Stolin

    2008-01-01

    Full Text Available In mathematics and theoretical physics, quantum groups are certain non-commutative, non-cocommutative Hopf algebras, which first appeared in the theory of quantum integrable models and later they were formalized by Drinfeld and Jimbo. In this paper we present a classification scheme for quantum groups, whose classical limit is a polynomial Lie algebra. As a consequence we obtain deformed XXX and XXZ Hamiltonians. 

  7. Ignalina Safety Analysis Group's report for the year 1998

    International Nuclear Information System (INIS)

    Uspuras, E.; Augutis, J.; Bubelis, E.; Cesna, B.; Kaliatka, A.

    1999-02-01

    Results of Ignalina NPP Safety Analysis Group's research are presented. The main fields of group's activities in 1998 were following: safety analysis of reactor's cooling system, safety analysis of accident localization system, investigation of the problem graphite - fuel channel, reactor core modelling, assistance to the regulatory body VATESI in drafting regulations and reviewing safety reports presented by Ignalina NPP during the process of licensing of unit 1

  8. Celebrating 50 years of the CERN Computing Operations group

    CERN Multimedia

    Katarina Anthony

    2013-01-01

    Last week, former and current computing operations staff, managers and system engineers were reunited at CERN. They came together to celebrate a milestone not only for the IT Department but also for CERN: the 50th anniversary of the CERN Operations group and the 40th birthday of the Computer Centre.   The reunion was organised by former chief operator, Pierre Bénassi, and took place from 26 to 27 April. Among the 44 attendees were Neil Spoonley and Charles Symons, who together created the Operations group back in 1963. “At that time, working in the Operations group was a very physical job,” recalls former Operations Group Leader, David Underhill. “For that reason, many of the first operators were former firemen.” A few of the participants enjoyed a tour of CERN landmarks during their visit (see photo). The group toured the CERN Computing Centre (accompanied by IT Department Head, Frédéric Hemmer), as well as the ATLAS cav...

  9. Research program of the Neutrino Research Group. Year 2004

    International Nuclear Information System (INIS)

    2004-01-01

    For the last two decades, neutrino physics has been producing major discoveries including neutrino oscillations. These results gave clear confirmation that active neutrinos oscillate and therefore have mass with three different mass states. This is a very important result showing that the Minimal Standard Model is incomplete and requires an extension which is not yet known. The neutrino research field is very broad and active, at the frontier of today's particle physics. The creation of a Neutrino Research Group (GDR) was proposed in 2004 with the aim of gathering CEA and CNRS research teams working on Neutrino Physics on experimental or theoretical level. This document presents the Research program of the Neutrino Research Group which is divided into 5 working groups with the following activities: 1 - Determination of neutrino parameters; 2 - Physics beyond the standard model; 3 - Neutrinos in the universe; 4 - Accelerators, detection means, R and D and valorisation; 5 - Common tools to all working groups. The research group participating laboratories and teams are listed at the end of the document

  10. A study on martensitic structure in Fe-4Cr-0.4C steel

    International Nuclear Information System (INIS)

    Won, S.B.

    1980-01-01

    Morphology, dependence of prior austenite grain size and packet size upon austenitizing temperature, distribution of lath width, and habit plane of martensitic structure in Fe-4Cr-0.4C steel has been studied by optical microscopy and transmission electron microscopy. The results obtained are as follows. 1) Optical microstructures of martensitic Fe-4Cr-0.4C steel consist of lath martensite and lens martensite. Also the four types of morphology are observed by electron microscopy. The most common morphologies are a regular paralleled martensite and an irregular dovetailed lath martensite, while the remainder of microstructures consists mainly of groups of internally twinned martensite and autotempered laths. 2) Prior austenite grain size and packet size increased with austenizing temperature, and also the numbers of lath contained in a prior austenite grain or a packet are increased with austenizing temperature. 3) The mean width of lath in Fe-4Cr-0.4C steel is about 0.23μm and most of lath widths are below 0.5μm. 4) Martensite habit plane of Fe-4Cr-0.4C steel is nearly [110]α'. (author)

  11. Positron annihilation characterization of free volume in micro- and macro-modified Cu0.4Co0.4Ni0.4Mn1.8O4 ceramics

    International Nuclear Information System (INIS)

    Klym, H.; Ingram, A.; Shpotyuk, O.; Hadzaman, I.; Solntsev, V.; Hotra, O.; Popov, A.

    2016-01-01

    Free volume and pore size distribution size in functional micro and macro-micro-modified Cu 0.4 Co 0.4 Ni 0.4 Mn 1.8 O 4 ceramics are characterized by positron annihilation lifetime spectroscopy in comparison with Hg-porosimetry and scanning electron microscopy technique. Positron annihilation results are interpreted in terms of model implication positron trapping and ortho-positronium decaying. It is shown that free volume of positron traps are the same type for macro and micro modified Cu 0.4 Co 0.4 Ni 0.4 Mn 1.8 O 4 ceramics. Classic Tao-Eldrup model in spherical approximation is used to calculation of the size of nanopores smaller than 2 nm using the ortho-positronium lifetime.

  12. Layered lithium manganese(0.4) nickel(0.4) cobalt(0.2) oxide(2) as cathode for lithium batteries

    Science.gov (United States)

    Ma, Miaomiao

    The lithium ion battery occupies a dominant position in the portable battery market today. Intensive research has been carried out on every part of the battery to reduce cost, avoid environmental hazards, and improve battery performance. The commercial cathode material LiCoO2 has been partially replaced by LiNiyCo1- yO2 in the last two years, and mixed metal oxides have been introduced in the last quarter. From a resources point of view, only about 10 million tons of cobalt deposits are available from the world's minerals. However, there is about 500 times more manganese available than cobalt. Moreover, cobalt itself is not environmentally friendly. The purpose of this work is to find a promising alternative cathode material that can maintain good cycling performance, while at the same time reducing the cost and toxicity. When the cost is lowered, it is then possible to consider the larger scale use of lithium ion batteries in application such as hybrid electric vehicles (HEV). The research work presented in this thesis has focused on a specific composition of a layered lithium transition metal oxide, LiMn0.4Ni 0.4Co0.2O2 with the R3¯m structure. The presence of cobalt plays a critical role in minimizing transition metal migration to the lithium layer, and perhaps also in enhancing the electronic conductivity; however, cobalt is in limited supply and it is therefore more costly than nickel or manganese. The performance of LiMn0.4Ni0.4Co 0.2O2 was investigated and characterized utilizing various techniques an its performance compared with cobalt free LiMn0.5N i0.5O2, as well as with LiMn1/3Ni1/3Co 1/3O2, which is the most extensively studied replacement candidate for LiNiyCo1- yO2, and may be in SONY'S new hybrid cells. First, the structure and cation distribution in LiMn0.4Ni 0.4Co0.2O2 was studied by a combination of X-ray and neutron diffraction experiments. This combination study shows that about 3--5% nickel is present in the lithium layer, while manganese and

  13. Balanced Hydroxyethylstarch (HES 130/0.4 Impairs Kidney Function In-Vivo without Inflammation.

    Directory of Open Access Journals (Sweden)

    Martin Alexander Schick

    Full Text Available Volume therapy is a standard procedure in daily perioperative care, and there is an ongoing discussion about the benefits of colloid resuscitation with hydroxyethylstarch (HES. In sepsis HES should be avoided due to a higher risk for acute kidney injury (AKI. Results of the usage of HES in patients without sepsis are controversial. Therefore we conducted an animal study to evaluate the impact of 6% HES 130/0.4 on kidney integrity with sepsis or under healthy conditions Sepsis was induced by standardized Colon Ascendens Stent Peritonitis (sCASP. sCASP-group as well as control group (C remained untreated for 24 h. After 18 h sCASP+HES group (sCASP+VOL and control+HES (C+VOL received 50 ml/KG balanced 6% HES (VOL 130/0.4 over 6 h. After 24 h kidney function was measured via Inulin- and PAH-Clearance in re-anesthetized rats, and serum urea, creatinine (crea, cystatin C and Neutrophil gelatinase-associated lipocalin (NGAL as well as histopathology were analysed. In vitro human proximal tubule cells (PTC were cultured +/- lipopolysaccharid (LPS and with 0.1-4.0% VOL. Cell viability was measured with XTT-, cell toxicity with LDH-test. sCASP induced severe septic AKI demonstrated divergent results regarding renal function by clearance or creatinine measure focusing on VOL. Soleley HES (C+VOL deteriorated renal function without sCASP. Histopathology revealed significantly derangements in all HES groups compared to control. In vitro LPS did not worsen the HES induced reduction of cell viability in PTC cells. For the first time, we demonstrated, that application of 50 ml/KG 6% HES 130/0.4 over 6 hours induced AKI without inflammation in vivo. Severity of sCASP induced septic AKI might be no longer susceptible to the way of volume expansion.

  14. Remote Sensing Information Sciences Research Group: Santa Barbara Information Sciences Research Group, year 4

    Science.gov (United States)

    Estes, John E.; Smith, Terence; Star, Jeffrey L.

    1987-01-01

    Information Sciences Research Group (ISRG) research continues to focus on improving the type, quantity, and quality of information which can be derived from remotely sensed data. Particular focus in on the needs of the remote sensing research and application science community which will be served by the Earth Observing System (EOS) and Space Station, including associated polar and co-orbiting platforms. The areas of georeferenced information systems, machine assisted information extraction from image data, artificial intelligence and both natural and cultural vegetation analysis and modeling research will be expanded.

  15. Biofilm Community Diversity after Exposure to 0.4% Stannous Fluoride Gels

    Science.gov (United States)

    Reilly, Cavan; Rasmussen, Karin; Selberg, Tieg; Stevens, Justin; Jones, Robert S.

    2015-01-01

    Aims To test the effect of %0.4 stannous fluoride (SnF2) glycerin based gels on the bacterial ecology in both a clinical observational study and in vitro polymicobial biofilm model. Methods and Results The influence of stannous fluoride (0.4% SnF2) gels on bacteria was tested in both an observational study in children 6-12 years of age (n=20) and an in vitro biofilm model system. The plaque derived multi-species bacterial biofilm model was based on clinical bacterial strains derived directly from the clinical study. Potential changes in the plaque ecology were determined through the Human Oral Microbial Identification Microarray-HOMIM (n=10). The semiquantitative data resulting from this system were analyzed with cumulative logit models for each bacterial strain and Bonferroni adjustments were employed to correct for multiple hypothesis testing. Both hierarchical biclustering and principal components analysis were used to graphically assess reproducibility within subjects over time. Mixed effects models were used to examine changes in plaque scores and numbers of bacterial strains found in the various conditions. Conclusions Both the observational clinical study and the biofilm model showed that short-term use of 0.4% SnF2 gel has little effect on the bacterial plaque ecology. The amount of plaque accumulation on a subject's teeth, which was measured by plaque index scores failed to show statistical significant changes over the two baselines or after treatment (p=0.9928). The in vitro results were similar when examining the effect of 0.4% SnF2 gels on biofilm adherence through a crystal violet assay (p= 0.1157). Significance and Impact of the Study The bacteria within the dental biofilms showed resilience in maintaining the overall community diversity after exposure to 0.4% Stannous Fluoride Gels. The study supports that the immediate benefits of using these gels each night to manage caries in children may be strictly from fluoride ions inhibiting tooth

  16. A three year profile comparison of a group of Special Operations candidates

    CSIR Research Space (South Africa)

    Van Heerden, Adelai

    2015-09-01

    Full Text Available examined, from a Positive Psychology perspective, candidates’ enlistment motivation in addition to their coping strategies. The qualitative results revealed that, despite candidates’ various reasons for enlisting, all three year groups were motivated...

  17. Domain analysis of computational science - Fifty years of a scientific computing group

    Energy Technology Data Exchange (ETDEWEB)

    Tanaka, M.

    2010-02-23

    I employed bibliometric- and historical-methods to study the domain of the Scientific Computing group at Brookhaven National Laboratory (BNL) for an extended period of fifty years, from 1958 to 2007. I noted and confirmed the growing emergence of interdisciplinarity within the group. I also identified a strong, consistent mathematics and physics orientation within it.

  18. Cross-year peer tutoring on internal medicine wards: results of a qualitative focus group analysis.

    Science.gov (United States)

    Krautter, Markus; Andreesen, Sven; Köhl-Hackert, Nadja; Hoffmann, Katja; Herzog, Wolfgang; Nikendei, Christoph

    2014-01-01

    Peer-assisted learning (PAL) has become a well-accepted teaching method within medical education. However, descriptions of on-ward PAL programs are rare. A focus group analysis of a newly established PAL program on an internal medicine ward was conducted to provide insights into PAL teaching from a student perspective. To provide insights into students' experiences regarding their on-ward training with and without accompanying PAL tutors. A total of N=168 medical students in their sixth semester participated in the investigation (intervention group: N=88; control group: N=80). The intervention group took part in the PAL program, while the control group received standard on-ward training. There were seven focus groups with N=43 participants (intervention group: four focus groups, N=28 participants; control group: three focus groups, N=15 participants). The discussions were analyzed using content analysis. The intervention group emphasized the role of the tutors as competent and well-trained teachers, most beneficial in supervising clinical skills. Tutors motivate students, help them to integrate into the ward team, and provide a non-fear-based working relationship whereby students' anxiety regarding working on ward decreases. The control group had to rely on autodidactic learning strategies when neither supervising physicians nor final-year students were available. On-ward PAL programs represent a particularly valuable tool for students' support in training clinical competencies on ward. The tutor-student working alliance acts through its flat hierarchy. Nevertheless, tutors cannot represent an adequate substitute for experienced physicians.

  19. Hot Deformation Behavior and Processing Map of Mg-3Sn-2Ca-0.4Al-0.4Zn Alloy

    Directory of Open Access Journals (Sweden)

    Chalasani Dharmendra

    2018-03-01

    Full Text Available Among newly developed TX (Mg-Sn-Ca alloys, TX32 alloy strikes a good balance between ductility, corrosion, and creep properties. This study reports the influence of aluminum and zinc additions (0.4 wt % each to TX32 alloy on its strength and deformation behavior. Uniaxial compression tests were performed under various strain rates and temperature conditions in the ranges of 0.0003–10 s−1 and 300–500 °C, respectively. A processing map was developed for TXAZ3200 alloy, and it exhibits three domains that enable good hot workability in the ranges (1 300–340 °C/0.0003–0.001 s−1; (2 400–480 °C/0.01–1 s−1; and (3 350–500 °C/0.0003–0.01 s−1. The occurrence of dynamic recrystallization in these domains was confirmed from the microstructural observations. The estimated apparent activation energy in Domains 2 and 3 (219 and 245 kJ/mole is higher than the value of self-diffusion in magnesium. This is due to the formation of intermetallic phases in the matrix that generates back stress. The strength of TXAZ3200 alloy improved up to 150 °C as compared to TX32 alloy, suggesting solid solution strengthening due to Al and Zn. Also, the hot deformation behavior of TXAZ3200 alloy was compared in the form of processing maps with TX32, TX32-0.4Al, TX32-0.4Zn, and TX32-1Al-1Zn alloys.

  20. Perioperative volume replacement in children undergoing cardiac surgery: albumin versus hydroxyethyl starch 130/0.4

    NARCIS (Netherlands)

    Hanart, Christophe; Khalife, Maher; de Villé, Andrée; Otte, Florence; de Hert, Stefan; van der Linden, Philippe

    2009-01-01

    OBJECTIVE: To compare 4% albumin with 6% hydroxyethyl starch (HES) 130/0.4 in terms of perioperative blood loss and intraoperative fluid requirements in children undergoing cardiac surgery. DESIGN: Prospective randomized study. SETTING: Single University Hospital. PATIENTS: Pediatric patients

  1. Synthesis and stereochemistry of 8.0.4' type neolignanes with a problable antileukemia activity

    International Nuclear Information System (INIS)

    Braga, A.C.H.; Barata, L.E.S.; Ruveda, E.A.

    The hexane extract from Virola surinameris leaves leads to isolate several compounds such as 8.0.4' type neolignanes surinamensine and viroline. Physical methods such as UV, IV, MS, etc are usec. (A.R.H.) [pt

  2. The Incorporation of the School Age Group of 16-18 Years Old in Gambling

    Directory of Open Access Journals (Sweden)

    MSc. Alfred Nela

    2015-06-01

    Full Text Available The scientific research of this paper focuses on the involvement of the school age group 16-18 years old in sports betting games impacted by beliefs on luck and social groups. For the collection of data literature is utilized, questionnaires are distributed and also focus groups were conducted. The assumptions of the assignment are: a The involvement of school age group 16-18 years in sports betting games are manners learned from their comrades, b The school age group 16-18 years old attribute to fate the participation in sports betting games. Over 64% of responses manifest that they have learned the rules from their companions. The revelations and questionnaire responses argue that over 45% of students in their classes play sports bets, and 34% think that the phenomena of sports betting depends on luck. The major part of this age group do not practice and believe in fortunate rituals or activities. The acquired data reflect that the extent of involvement of this age group is in substantial dimensions. We suggest that the decision-making bodies and service providers should develop strategies in order to reduce the phenomenon.

  3. Efficacy and Tolerability of Tamsulosin 0.4 mg in Patients with Symptomatic Benign Prostatic Hyperplasia

    OpenAIRE

    Chung, Jae-Wook; Choi, Seock Hwan; Kim, Bum Soo; Kim, Tae-Hwan; Yoo, Eun Sang; Kim, Chun Il; Lee, Kyung Seop; Kwon, Tae Gyun

    2011-01-01

    Purpose To evaluate the efficacy and tolerability of tamsulosin 0.4 mg once daily in Korean patients with symptomatic benign prostatic hyperplasia (BPH) and investigate whether tamsulosin 0.4 mg can improve symptoms in patients with refractory lower urinary tract symptoms (LUTS) who were previously receiving tamsulosin 0.2 mg once daily. Materials and Methods A total of 116 patients from 3 urology centers participated. All study subjects entered a nonblind phase consisting of 8 weeks of tamsu...

  4. Forging of cast Mg-3Sn-2Ca-0.4Al-0.4Si magnesium alloy using processing map

    International Nuclear Information System (INIS)

    Rao, K. P.; Suresh, K.; Prasad, Y. V. R. K.; Hort, N.; Kainer, K. U.

    2016-01-01

    Mg-3Sn-2Ca (TX32) alloy has good creep resistance but limited workability. Minor amounts of Al and Si have been added to TX32 for improving its hot workability. The processing map for the TX32-0.4Al-0.4Si alloy exhibited two workability domains in the temperature and strain rate ranges: (1) 310-415.deg.C/0.0003-0.003 s-1 and (2) 430-500.deg.C/0.003-3 s-1. The alloy exhibited flow instability at temperatures < 350.deg.C at strain rates > 0.01 s-1. The alloy has been forged to produce a cup shape component to validate these findings of processing map. Finite-element (FE) simulation has been performed for obtaining the local variations of strain and strain rate within the forging. The microstructures of the forged components under the optimal domain conditions revealed dynamically recrystallized grains, and those forged in the flow instability regime have fractured and exhibited flow localization bands and cracks. The experimental load stroke curves correlated well with those obtained by FE simulation.

  5. Forging of cast Mg-3Sn-2Ca-0.4Al-0.4Si magnesium alloy using processing map

    Energy Technology Data Exchange (ETDEWEB)

    Rao, K. P.; Suresh, K.; Prasad, Y. V. R. K. [University of Hong Kong, Hong Kong (China); Hort, N.; Kainer, K. U. [Magnesium Innovation Centre, Geesthacht (Germany)

    2016-06-15

    Mg-3Sn-2Ca (TX32) alloy has good creep resistance but limited workability. Minor amounts of Al and Si have been added to TX32 for improving its hot workability. The processing map for the TX32-0.4Al-0.4Si alloy exhibited two workability domains in the temperature and strain rate ranges: (1) 310-415.deg.C/0.0003-0.003 s-1 and (2) 430-500.deg.C/0.003-3 s-1. The alloy exhibited flow instability at temperatures < 350.deg.C at strain rates > 0.01 s-1. The alloy has been forged to produce a cup shape component to validate these findings of processing map. Finite-element (FE) simulation has been performed for obtaining the local variations of strain and strain rate within the forging. The microstructures of the forged components under the optimal domain conditions revealed dynamically recrystallized grains, and those forged in the flow instability regime have fractured and exhibited flow localization bands and cracks. The experimental load stroke curves correlated well with those obtained by FE simulation.

  6. Second malignancies complicating Hodgkin's disease: a Southwest Oncology Group 10-year followup

    International Nuclear Information System (INIS)

    Coltman, C.A. Jr.; Dixon, D.O.

    1982-01-01

    Thirty-two second malignancies (21 acute leukemias and 11 solid tumors) were identified among 659 patients with all stages of Hodgkin's disease treated by members of the Southwest Oncology Group. There were no leukemias and one solid tumor among 95 patients treated with radiotherapy alone. The actuarial risk of developing acute leukemia at 7 years was 6.2% for chemotherapy alone, 6.4% for combined modality, and 7.7% for salvage chemotherapy. The incidence of acute leukemia was higher (P . 0.002) among those whose treatment began at greater than or equal to 40 years of age. The actuarial risk of leukemia in that group was 20.7% at 7 years. These data are compatible with the hypothesis that chemotherapy alone, combined modality, and salvage chemotherapy have an equivalent oncogenic potential and that patients greater than or equal to 40 years of age have an enhanced susceptibility to these oncogenic stimuli

  7. Electrochemical properties of the MmNi3.55Mn0.4Al0.3Co0.4Fe0.35 compound

    International Nuclear Information System (INIS)

    Moussa, M. Ben; Abdellaoui, M.; Mathlouthi, H.; Lamloumi, J.; Guegan, A. Percheron

    2005-01-01

    In this paper, the electrochemical properties of the MmNi 3.55 Mn 0.4 Al 0.3 Co 0.4 Fe 0.35 alloy used as a negative electrode in Ni-MH accumulators, have been investigated by different electrochemical methods such as cyclic voltammetry, chronopotentiometry, chronoamperometry and electrochemical impedance spectroscopy. The experimental results indicate that the discharge capacity reaches a maximum value of 260 mAh g -1 after 12 cycles and then decreases to about 200 mAh g -1 after 70 cycles. The value of the mean diffusion coefficient D H , determined by cyclic voltammetry, is about 3.44 x 10 -9 cm 2 s -1 , whereas the charge transfer coefficient α, determined by the same method, is about 0.5 which allows us to conclude that the electrochemical reaction is reversible. The hydrogen diffusion coefficients in this compound, corresponding to 10 and 100% of the charge state, determined by electrochemical impedance spectroscopy, are, respectively, equal to 4.15 x 10 -9 cm 2 s -1 (α phase) and 2.15 x 10 -9 cm 2 s -1 (β phase). These values are higher, for the α phase and less, for the β phase, than the mean value determined by cyclic voltammetry. We assume that this is related to the number of interstitial sites susceptible to accept the hydrogen atom, which are more numerous in the α phase than in the β phase. The chronoamperometry shows that the average size of the particles involved in the electrochemical reaction is about 12 μm

  8. Large linear magnetoresistance in topological crystalline insulator Pb_0_._6Sn_0_._4Te

    International Nuclear Information System (INIS)

    Roychowdhury, Subhajit; Ghara, Somnath; Guin, Satya N.; Sundaresan, A.; Biswas, Kanishka

    2016-01-01

    Classical magnetoresistance generally follows the quadratic dependence of the magnetic field at lower field and finally saturates when field is larger. Here, we report the large positive non-saturating linear magnetoresistance in topological crystalline insulator, Pb_0_._6Sn_0_._4Te, at different temperatures between 3 K and 300 K in magnetic field up to 9 T. Magnetoresistance value as high as ∼200% was achieved at 3 K at magnetic field of 9 T. Linear magnetoresistance observed in Pb_0_._6Sn_0_._4Te is mainly governed by the spatial fluctuation carrier mobility due to distortions in the current paths in inhomogeneous conductor. - Graphical abstract: Large non-saturating linear magnetoresistance has been evidenced in topological crystalline insulator, Pb_0_._6Sn_0_._4Te, at different temperatures between 3 K and 300 K in magnetic field up to 9 T. - Highlights: • Large non-saturating linear magnetoresistance was achieved in the topological crystalline insulator, Pb_0_._6Sn_0_._4Te. • Highest magnetoresistance value as high as ~200% was achieved at 3 K at magnetic field of 9 T. • Linear magnetoresistance in Pb_0_._6Sn_0_._4Te is mainly governed by the spatial fluctuation of the carrier mobility.

  9. Relative stability of core groups in pollination networks in a biodiversity hotspot over four years.

    Science.gov (United States)

    Fang, Qiang; Huang, Shuang-Quan

    2012-01-01

    Plants and their pollinators form pollination networks integral to the evolution and persistence of species in communities. Previous studies suggest that pollination network structure remains nested while network composition is highly dynamic. However, little is known about temporal variation in the structure and function of plant-pollinator networks, especially in species-rich communities where the strength of pollinator competition is predicted to be high. Here we quantify temporal variation of pollination networks over four consecutive years in an alpine meadow in the Hengduan Mountains biodiversity hotspot in China. We found that ranked positions and idiosyncratic temperatures of both plants and pollinators were more conservative between consecutive years than in non-consecutive years. Although network compositions exhibited high turnover, generalized core groups--decomposed by a k-core algorithm--were much more stable than peripheral groups. Given the high rate of turnover observed, we suggest that identical plants and pollinators that persist for at least two successive years sustain pollination services at the community level. Our data do not support theoretical predictions of a high proportion of specialized links within species-rich communities. Plants were relatively specialized, exhibiting less variability in pollinator composition at pollinator functional group level than at the species level. Both specialized and generalized plants experienced narrow variation in functional pollinator groups. The dynamic nature of pollination networks in the alpine meadow demonstrates the potential for networks to mitigate the effects of fluctuations in species composition in a high biodiversity area.

  10. Seed fall and regeneration from a group selection cut . . . first year results

    Science.gov (United States)

    Philip M. McDonald

    1966-01-01

    To approximate a group selection cut at the Challenge Experimental Forest, 48 small openings of three sizes—30, 60, and 90 feet in diameter—were logged in 1963. One aim was to create conditions of light and soil moisture that would favor establishment and growth of Douglas-fir, sugar pine, and white fir over ponderosa pine. Seed fall and first-year...

  11. Ten-year diameter and basal area growth of trees surrounding small group selection openings

    Science.gov (United States)

    Philip M. McDonald; Martin W. Ritchie; Celeste S. Abbott

    1996-01-01

    The effects of small openings in forest stands has interested silviculturists and ecologists for years. Interest generally has centered on the vegetation in the openings, not on that immediately outside of them. Quantitative information on the growth of trees adjacent to group-selection openings, although often mentioned in forestry textbooks as contributing to cost...

  12. Dyslexia: Group Screening among 15-16-Year-Olds in Oslo, Norway

    Science.gov (United States)

    Green, K.; Tonnessen, F. E.; Tambs, K.; Thoresen, M.; Bjertness, E.

    2009-01-01

    In 15-16 year olds from Oslo, Norway, we investigated the occurrence of self-reported dyslexia and reading/writing difficulties (RWD), and we measured dyslexic symptoms using the "Duvan" dyslexia screening test. The prevalence of self-reported dyslexia was 8.2%, while 10.4% reported severe or moderate RWD. The group of self-reported…

  13. Establishing Peer Mentor-Led Writing Groups in Large First-Year Courses

    Science.gov (United States)

    Marcoux, Sarah; Marken, Liv; Yu, Stan

    2012-01-01

    This paper describes the results of a pilot project designed to improve students' academic writing in a large (200-student) first-year Agriculture class at the University of Saskatchewan. In collaboration with the course's professor, the Writing Centre coordinator and a summer student designed curriculum for four two-hour Writing Group sessions…

  14. Annual activity report of Ignalina NPP Safety Analysis Group for the year 1997

    International Nuclear Information System (INIS)

    Ushpuras, E.; Augutis, J.; Bubelis, E.; Kaliatka, A

    1998-01-01

    The main results of Ignalina NPP Safety Analysis Group (ISAG) investigations for the year 1997 are presented. ISAG is concentrating its research activities into four areas: the neutrons dynamics modelling, simulation of transient processes during loss of coolant accident, the reactor cooling systems modelling and the probabilistic safety assessment of accident confinement system

  15. Cross-year peer tutoring on internal medicine wards: results of a qualitative focus group analysis

    Directory of Open Access Journals (Sweden)

    Krautter M

    2014-09-01

    Full Text Available Markus Krautter,1 Sven Andreesen,2 Nadja Köhl-Hackert,2 Katja Hoffmann,3 Wolfgang Herzog,2 Christoph Nikendei2 1Department of Nephrology, University of Heidelberg, 2Department of General Internal Medicine and Psychosomatics, University of Heidelberg Medical Hospital, 3Department of General Practice and Health Services Research, University Hospital Heidelberg, Heidelberg, Germany Background: Peer-assisted learning (PAL has become a well-accepted teaching method within medical education. However, descriptions of on-ward PAL programs are rare. A focus group analysis of a newly established PAL program on an internal medicine ward was conducted to provide insights into PAL teaching from a student perspective.Purpose: To provide insights into students' experiences regarding their on-ward training with and without accompanying PAL tutors.Methods: A total of N=168 medical students in their sixth semester participated in the investigation (intervention group: N=88; control group: N=80. The intervention group took part in the PAL program, while the control group received standard on-ward training. There were seven focus groups with N=43 participants (intervention group: four focus groups, N=28 participants; control group: three focus groups, N=15 participants. The discussions were analyzed using content analysis.Results: The intervention group emphasized the role of the tutors as competent and well-trained teachers, most beneficial in supervising clinical skills. Tutors motivate students, help them to integrate into the ward team, and provide a non-fear-based working relationship whereby students' anxiety regarding working on ward decreases. The control group had to rely on autodidactic learning strategies when neither supervising physicians nor final-year students were available.Conclusion: On-ward PAL programs represent a particularly valuable tool for students' support in training clinical competencies on ward. The tutor–student working alliance

  16. Proposals for improving the mother tongue from the orientation of the academic year` s group

    Directory of Open Access Journals (Sweden)

    Virgen Arelys Ferrer-Miyares

    2017-04-01

    Full Text Available When graduating from the university students must demonstrate that they master the Spanish language that allows them the development of a coherent, fluid and expressive oral and written comunication with a good spelling and calligraphy. For achieving a positive result, it is essential to assume a stance of analysis, internalization and reflection. It depends on how the student, profesor and group year face this pedagogical challenge that can only be beat with perseverance, interest, knowledges and team work. The aim of this project is to socialize the experiences achieved from the orientation done by the academic year`s group that made posible an adequate treatment to the improvement of students` mother tongue.

  17. A 65mW,0.4-2.3 GHz bandpass filter for satellite receivers

    NARCIS (Netherlands)

    Tang, van der J.D.; Kasperkovitz, D.; Bretveld, A.

    2002-01-01

    A monolithic tunable bandpass filter for satellite receiver front-ends is presented. The nter frequency of the bandpass filter can be tuned from 0.4 GHz to 2.3 GHz. The filter is constructed using four transconductor-C poly-phase filter sections and has a 50 dB variable gain range. At 20 dB

  18. Gender differences in leadership amongst first-year medical students in the small-group setting.

    Science.gov (United States)

    Wayne, Nancy L; Vermillion, Michelle; Uijtdehaage, Sebastian

    2010-08-01

    To investigate the extent of gender bias in the volunteerism of small-group leaders amongst first-year medical students, and whether bias could be eliminated with special instructions to the students. The gender of leaders in small-group sessions in a real academic setting was monitored under two conditions: control conditions, in which basic instructions were provided to participants, and intervention conditions, in which the same basic instructions were provided plus a brief "pep talk" on the importance of experiencing a leadership role in a safe environment. During the small-group sessions, an observer noted the gender and names of group leaders for later analysis. After a class debriefing, a subset of leaders and nonleaders from both the control and intervention groups were invited to be interviewed about their perceptions of the small-group experience. Interviews were tape recorded and transcribed for analysis. In 2007-2008 and 2008-2009, disproportionately fewer women than men volunteered to become small-group leaders under control conditions. This gender bias was eliminated under intervention conditions. The interviews illustrated how a subtle change in instructions helped some female students take on a leadership role. Gender bias in leadership in the small-group setting amongst medical students-even when women make up half of the class-may persist without targeted intervention. The authors suggest that frequent and consistent intervention during medical school could be an important factor in encouraging women to identify themselves as leaders, promoting confidence to consider leadership roles in medicine.

  19. Stimulated transformation in nano-layered composites with Se0.6Te0.4

    International Nuclear Information System (INIS)

    Malyovanik, M.; Shipljak, M.; Cheresnya, V.; Ivan, I.; Csik, A.; Kokenyesi, S.; Debrecen Univ.

    2005-01-01

    Complete text of publication follows. The main types of the photo-induced structural transformations (PST) in chalcogenide glasses and amorphous layers can be systematized as i) structural transformations within amorphous phase, ii) photo-induced crystallization or amorphyzation, iii) photo-induced mass transport. These main known types of PST can be further detailed, for example concerning photo-induced anisotropy, photo- bleaching, etc., and are widely investigated. But the fundamentals of these effects even in the most known compositions like AsSe, As 2 S 3 are not clear, especially for the nanostructures, where the possible cluster formation, size restrictions and interface conditions may essentially influence the parameters of the material. Furthermore, the basic applied problem related to the PST consists of the possibility of digital or analog optical information storage, phase change memory, fabrication of elements for optics and photonics. These applications require determined spectral and temperature range of functioning, increased sensitivity, transformation rates and stability of the memory at the same time. The realization of such requirements can be expected in nanosized objects made of chalcogenides due to the suitable change of thermodynamical parameters, conductivity, optical and other characteristics. The establishment of correlations between the compositional modulation at nanoscale-dimensions (3-10 nm) in Se 0.6 Te 0.4 and the changes of the optical and electrical parameters as well as the possible improvement of optical recording process in comparison with homogeneous Se 0.6 Te 0.4 films were the aims of the present work. Two types of nano-multilayers, namely Se 0.6 Te 0.4 /SiO x and Se 0.6 Te 0.4 /As 2 S 3 were investigated with respect to the thermo- or light-stimulated structural transformations, since they strongly di r by the possibility of intermixing or crystallization in a steady-state process of heating or laser illumination. Photo

  20. A Band of Sisters: The Impact of Long-Term Small Group Participation--Forty Years in a Women's Prayer and Bible Study Group

    Science.gov (United States)

    Lawson, Kevin E.

    2006-01-01

    This article reports on a case study of a women's prayer and Bible study group that has met for over forty years. The report focuses on factors contributing to the group's longevity and vitality over time, how it changed over the years, and its impact on the lives of the women who participated in it. It also addresses how this long-term group…

  1. Identifying groups at risk for 1-year membership termination from a fitness center at enrollment

    Directory of Open Access Journals (Sweden)

    Stephanie A. Hooker

    2016-12-01

    Full Text Available The vast majority of Americans do not engage in adequate regular physical activity despite its well-known health benefits. Even when individuals attempt to become more active by joining a fitness center, estimates suggest that nearly half terminate their membership within the first 6 months. A better understanding of who is at risk for early membership termination upon joining may help researchers develop targeted interventions to improve the likelihood that individuals will successfully maintain memberships and physical activity. This study's purpose was to identify, based on a wellness assessment (WA used in fitness centers, individuals at risk for fitness membership termination prior to 1-year. Center members (N = 441; Mage = 41.9, SD = 13.1; 74.4% female completed a comprehensive WA of stress, life satisfaction, physical fitness, metabolic health, and sleep quality at the beginning of their memberships and were followed for one year. Latent class analyses utilized the WA to identify four groups: (a healthy, (b unhealthy, (c poor psychological wellness, and (d poor physical wellness. Participants in the poor psychological wellness group (OR = 2.24, p = 0.007 and the unhealthy group (OR = 2.40, p = 0.037 were significantly more likely to terminate their memberships at 1-year as compared to the healthy group. Participants with poor physical wellness visited the fitness center less frequently than healthy participants (p < 0.01. Results suggest that poor psychological wellness is a risk factor for terminating memberships, whereas poor physical wellness is not. Future studies should replicate these latent classes and develop targeted interventions to address psychological wellness as a method to improve fitness membership retention.

  2. Diverse Effects of a Seven-Year Experimental Grassland Fragmentation on Major Invertebrate Groups.

    Science.gov (United States)

    Braschler, Brigitte; Baur, Bruno

    2016-01-01

    Habitat fragmentation is a major driver of biodiversity loss, but observed effects vary and may depend on the group examined. Time since fragmentation may explain some differences between taxonomical groups, as some species and thus species composition respond with a delay to changes in their environment. Impacts of drivers of global change may thus be underestimated in short-term studies. In our study we experimentally fragmented nutrient-poor dry calcareous grasslands and studied the response of species richness, individual density and species composition of various groups of invertebrates (gastropods, ants, ground beetles, rove beetles, orthoptera, spiders, woodlice) in 12 small (1.5 m * 1.5 m) and 12 large (4.5 m * 4.5 m) fragments and their corresponding control plots after 7 years. We further examined responses to fragmentation in relation to body size and habitat preferences. Responses to fragmentation varied between taxonomical groups. While spider species richness and individual density were lower in fragments, the opposite was true for an orthopteran species and woodlice. Species composition and β-diversity differed between fragments and control plots for some groups. However, the interaction treatment*plot size was rarely significant. Species with high occupancy rates in undisturbed control plots responded more negatively to the fragmentation, while species with large body size were relatively more abundant in fragments in some groups. No effect of the fragmentation was found for ants, which may have the longest lag times because of long-lived colonies. However, relationships between abundance and the species' preferences for environmental factors affected by edge effects indicate that ant diversity too may be affected in the longer-term. Our results show the importance of considering different groups in conservation management in times of widespread fragmentation of landscapes. While species richness may respond slowly, changes in abundance related to

  3. Diverse Effects of a Seven-Year Experimental Grassland Fragmentation on Major Invertebrate Groups.

    Directory of Open Access Journals (Sweden)

    Brigitte Braschler

    Full Text Available Habitat fragmentation is a major driver of biodiversity loss, but observed effects vary and may depend on the group examined. Time since fragmentation may explain some differences between taxonomical groups, as some species and thus species composition respond with a delay to changes in their environment. Impacts of drivers of global change may thus be underestimated in short-term studies. In our study we experimentally fragmented nutrient-poor dry calcareous grasslands and studied the response of species richness, individual density and species composition of various groups of invertebrates (gastropods, ants, ground beetles, rove beetles, orthoptera, spiders, woodlice in 12 small (1.5 m * 1.5 m and 12 large (4.5 m * 4.5 m fragments and their corresponding control plots after 7 years. We further examined responses to fragmentation in relation to body size and habitat preferences. Responses to fragmentation varied between taxonomical groups. While spider species richness and individual density were lower in fragments, the opposite was true for an orthopteran species and woodlice. Species composition and β-diversity differed between fragments and control plots for some groups. However, the interaction treatment*plot size was rarely significant. Species with high occupancy rates in undisturbed control plots responded more negatively to the fragmentation, while species with large body size were relatively more abundant in fragments in some groups. No effect of the fragmentation was found for ants, which may have the longest lag times because of long-lived colonies. However, relationships between abundance and the species' preferences for environmental factors affected by edge effects indicate that ant diversity too may be affected in the longer-term. Our results show the importance of considering different groups in conservation management in times of widespread fragmentation of landscapes. While species richness may respond slowly, changes in

  4. Social anxiety and alcohol use across the university years: Adaptive and maladaptive groups.

    Science.gov (United States)

    Brook, Christina A; Willoughby, Teena

    2016-05-01

    University/college can be a challenging time as students face developmental tasks such as building new social networks and achieving academically. Social anxiety may be disadvantageous in this setting given that social situations often include drinking and individuals with social anxiety tend to self-medicate through alcohol use. However, findings are mixed as to whether the association between social anxiety and alcohol use is positive or negative. To clarify the nature of this association, we used a person-centered longitudinal analysis to identify student groups based on levels of social anxiety symptoms and alcohol consumption. Undergraduates (N = 1132, 70.5% female, Mage = 19.06 at Time 1) enrolled in university completed a survey assessing social anxiety and alcohol use over 3 years, and psychosocial functioning and emotion coping behaviors at Time 1. Two out of 5 groups were identified with higher levels of social anxiety, 1 with moderately low alcohol use, and the other with moderately high alcohol use. Both groups reported higher levels of general anxiety, depressive symptoms, behavioral inhibition, emotional reactivity, daily hassles, and lower levels of social ties at Time 1 than the 3 groups with lower levels of social anxiety. Furthermore, the social anxiety-alcohol use group reported significantly lower academic grades and was more likely to endorse problematic emotion coping behaviors (e.g., self-injury) than the social anxiety-low alcohol use group. These results not only help explain the mixed findings in the literature but indicate that 1 group of socially anxious students may be particularly vulnerable to negative adjustment difficulties. (PsycINFO Database Record (c) 2016 APA, all rights reserved).

  5. Evolution of Mg-5Al-0.4Mn microstructure after rare earth elements addition

    Directory of Open Access Journals (Sweden)

    A. Żydek

    2011-04-01

    Full Text Available Mg-5Al-0.4Mn-xRE (x = 0, 1, 2, 3 wt.% magnesium alloys were prepared successfully by casting method. The microstructure wasinvestigated by light microscopy. The influence of rare earth (RE elements on the area fraction of eutectic was analysed. The obtainedresults revealed that the as-cast Mg-5Al-0.4Mn alloy consist of α - Mg matrix and eutectic α + γ (where γ is Mg17Al12. However, whilerare earth elements were added to the Mg-Al type alloy, Al11RE3 precipitates were formed. The amount of the Al11RE3 precipitatesincreased with increasing addition of RE, but the amount of γ - Mg17Al12 decreased.

  6. Synthesis of LaNi0,6Fe0.4O3-δ

    International Nuclear Information System (INIS)

    Ramos, K.; Wendler, L.P.; Chinelatto, A.S.; Chinelatto, A.L.

    2012-01-01

    The solid oxide fuel cell are an alternative of production clean and efficient energy, because converts chemical energy in electrical energy. An fuel cell is formed basically by an electrolyte, a cathode and an anode.The main electrolyte used for SOFC manufacturing is the ZrO 2 -Y 2 O 3 . The materials for electrode manufacturing must possess thermal expansion characteristics close to electrolyte and have high electrical conductivity in operating temperature.Recently, the perovskite LaNi 0,6 Fe 0,4 O 3-δ , has attracted interest for application as cathode in SOFC's. This work aimed to LaNi 0,6 Fe 0,4 O 3-δ obtained by Pechini method. The powders were characterized by x-ray diffraction, ray-x fluorescence, heliumpicnometry and scanning electron microscopy. The results showed powders obtained with perovskite formation when calcined 600°C during 2 hours. (author)

  7. The American Oystercatcher (Haematopus palliatus) Working Group: 15 years of collaborative focal species research and management

    Science.gov (United States)

    Simons, Theodore R.

    2017-01-01

    The American Oystercatcher (Haematopus palliatus) Working Group formed spontaneously in 2001 as coastal waterbird biologists recognized the potential for American Oystercatchers to serve as focal species for collaborative research and management. Accomplishments over the past 15 years include the establishment of rangewide surveys, color-banding protocols, mark-resight studies, a revision of the Birds of North America species account, and new mechanisms for sharing ideas and data. Collaborations among State, Federal, and private sector scientists, natural resource managers, and dedicated volunteers have provided insights into the biology and conservation of American Oystercatchers in the United States and abroad that would not have been possible without the relationships formed through the Working Group. These accomplishments illustrate how broad collaborative approaches and the engagement of the public are key elements of effective shorebird conservation programs.

  8. Measurements of electron-proton elastic cross sections for 0.4 2 2

    International Nuclear Information System (INIS)

    Christy, M.E.; Ahmidouch, Abdellah; Armstrong, Christopher; Arrington, John; Razmik Asaturyan; Steven Avery; Baker, O.; Douglas Beck; Henk Blok; Bochna, C.W.; Werner Boeglin; Peter Bosted; Maurice Bouwhuis; Herbert Breuer; Brown, D.S.; Antje Bruell; Roger Carlini; Nicholas Chant; Anthony Cochran; Leon Cole; Samuel Danagoulian; Donal Day; James Dunne; Dipangkar Dutta; Rolf Ent; Howard Fenker; Fox, B.; Liping Gan; Haiyan Gao; Kenneth Garrow; David Gaskell; Ashot Gasparian; Don Geesaman; Paul Gueye; Mark Harvey; Roy Holt; Xiaodong Jiang; Cynthia Keppel; Edward Kinney; Yongguang Liang; Wolfgang Lorenzon; Allison Lung; Pete Markowitz; Martin, J.W.; Kevin McIlhany; Daniella Mckee; David Meekins; Miller, J.W.; Richard Milner; Joseph Mitchell; Hamlet Mkrtchyan; Robert Mueller; Alan Nathan; Gabriel Niculescu; Maria-Ioana Niculescu; Thomas O'neill; Vassilios Papavassiliou; Stephen Pate; Buz Piercey; David Potterveld; Ronald Ransome; Joerg Reinhold; Rollinde, E.; Philip Roos; Adam Sarty; Reyad Sawafta; Elaine Schulte; Edwin Segbefia; Smith, C.; Stepan Stepanyan; Steffen Strauch; Vardan Tadevosyan; Liguang Tang; Raphael Tieulent; Alicia Uzzle; William Vulcan; Stephen Wood; Feng Xiong; Lulin Yuan; Markus Zeier; Benedikt Zihlmann; Vitaliy Ziskin

    2004-01-01

    We report on precision measurements of the elastic cross section for electron-proton scattering performed in Hall C at Jefferson Lab. The measurements were made at 28 unique kinematic settings covering a range in momentum transfer of 0.4 2 2 . These measurements represent a significant contribution to the world's cross section data set in the Q 2 range where a large discrepancy currently exists between the ratio of electric to magnetic proton form factors extracted from previous cross section measurements and that recently measured via polarization transfer in Hall A at Jefferson Lab

  9. Monoclinic mixed crystals of halogenomethanes CBr4-nCln (n = 0, ..., 4)

    International Nuclear Information System (INIS)

    Negrier, Philippe; Tamarit, Josep Ll.; Barrio, Maria; Pardo, Luis C.; Mondieig, Denise

    2007-01-01

    On the basis of the isostructural relationship between the low-temperature monoclinic (C2/c, Z = 32) phases of the halogenomethane CBr 4-n Cl n (n = 0, ..., 4), a set of mixed crystals has been analysed by means of high-resolution X-ray powder diffraction. It is shown that the monoclinic structure of pure and mixed crystals does not depend of the particularities of the dipolar (or dipole induced) interactions of the pure compound, neither on the composition of the mixed crystal, but on the relative content of the halogen atoms which controls the size of the molecule or the average molecule for the case of mixed crystals

  10. Mechanical neutron velocity selector for wavelengths over 0.4 nm

    International Nuclear Information System (INIS)

    Tieben, H.; Wendt, W.

    1975-07-01

    A mechanical velocity selector with twisted acrylic glass plates glued to the rotor is described. The selector is designed for use in the neutron wavelength region above 0.4 nanometers. The transmission is 62% and the full width at half maximum of the triangular spectrum of the transmitted neutrons with the wavelength lambda sub(o) is +- 0.06 lambda sub(o). The rotor runs in the vacuum; it is magnetically coupled to the drive motor, its speed is stabilized to maximum deviations of 0.03%. The application of the selector in studies of bloch walls is described. (orig.) [de

  11. 'Putting Life in Years' (PLINY) telephone friendship groups research study: pilot randomised controlled trial.

    Science.gov (United States)

    Mountain, Gail A; Hind, Daniel; Gossage-Worrall, Rebecca; Walters, Stephen J; Duncan, Rosie; Newbould, Louise; Rex, Saleema; Jones, Carys; Bowling, Ann; Cattan, Mima; Cairns, Angela; Cooper, Cindy; Edwards, Rhiannon Tudor; Goyder, Elizabeth C

    2014-04-24

    Loneliness in older people is associated with poor health-related quality of life (HRQoL). We undertook a parallel-group randomised controlled trial to evaluate the effectiveness and cost-effectiveness of telephone befriending for the maintenance of HRQoL in older people. An internal pilot tested the feasibility of the trial and intervention. Participants aged >74 years, with good cognitive function, living independently in one UK city were recruited through general practices and other sources, then randomised to: (1) 6 weeks of short one-to-one telephone calls, followed by 12 weeks of group telephone calls with up to six participants, led by a trained volunteer facilitator; or (2) a control group. The main trial required the recruitment of 248 participants in a 1-year accrual window, of whom 124 were to receive telephone befriending. The pilot specified three success criteria which had to be met in order to progress the main trial to completion: recruitment of 68 participants in 95 days; retention of 80% participants at 6 months; successful delivery of telephone befriending by local franchise of national charity. The primary clinical outcome was the Short Form (36) Health Instrument (SF-36) Mental Health (MH) dimension score collected by telephone 6 months following randomisation. We informed 9,579 older people about the study. Seventy consenting participants were randomised to the pilot in 95 days, with 56 (80%) providing valid primary outcome data (26 intervention, 30 control). Twenty-four participants randomly allocated to the research arm actually received telephone befriending due to poor recruitment and retention of volunteer facilitators. The trial was closed early as a result. The mean 6-month SF-36 MH scores were 78 (SD 18) and 71 (SD 21) for the intervention and control groups, respectively (mean difference, 7; 95% CI, -3 to 16). Recruitment and retention of participants to a definitive trial with a recruitment window of 1 year is feasible. For

  12. The Dependence of galaxy colors on luminosity and environment at z~0.4

    Energy Technology Data Exchange (ETDEWEB)

    Yee, H.K.C.; /Toronto U., Astron. Dept.; Hsieh, B.C.; /Taiwan, Natl. Central U. /Taipei, Inst. Astron. Astrophys.; Lin, Huan; /Fermilab; Gladders, M.D.; /Carnegie Inst.

    2005-08-01

    The authors analyze the B-R{sub c} colors of galaxies as functions of luminosity and local galaxy density using a large photometric redshift catalog based on the Red-Sequence Cluster Survey. They select two samples of galaxies with a magnitude limit of M{sub R{sub e}} < -18.5 and redshift ranges of 0.2 {le} z < 0.4 and 0.4 {le} x < 0.6 containing 10{sup 5} galaxies each. they model the color distributions of subsamples of galaxies and derive the red galaxy fraction and peak colors of red and blue galaxies as functions of galaxy luminosity and environment. The evolution of these relationships over the redshift range of x {approx} 0.5 to z {approx} 0.05 is analyzed in combination with published results from the Sloan Digital Sky Survey. They find that there is a strong evolution in the restframe peak color of bright blue galaxies in that they become redder with decreasing redshift, while the colors of faint blue galaxies remain approximately constant. This effect supports the ''downsizing'' scenario of star formation in galaxies. While the general dependence of the galaxy color distributions on the environment is small, they find that the change of red galaxy fraction with epoch is a function of the local galaxy density, suggesting that the downsizing effect may operate with different timescales in regions of different galaxy densities.

  13. Childhood Risk Factors in Substance Abuse Among a Group of Abuser 20-30 Year-Old Group in Tehran

    Directory of Open Access Journals (Sweden)

    A.R. Zahiredin

    2004-01-01

    Full Text Available Substance use disorder is the second most common psychiatric disorders and is far more prevalent among young adults (ages;18-34y/0. Because of its importance and main effect in society, this study performed for evaluation of association fourteen childhood and adoleseence pathologic factors with substance use disorder among a group of abuser (20-30/0that referred to five addiction center in Tehran . The sample consist 100 patient: including 50 case and 50 control who were selected by DSM- IV based semi-structured diagnostic interviews for decrease memory biases in this retrospective cohart study. The patient’s parents also evaluated by DSM- IV based Semi-structured diagnostic interviews. The analysis showed significant relation between: parents control on the siblings, addiction in relatives of pt (except parents, addicted peers and friends, to be affected with the peers and friends and substance use disorder at the ages (20-30y/o. There wasn’t any association between: Disruptive childhood behaviors (under 11y/o, diagnosed medical illness (under 11y/o diagnosed Psychiatric illness (under 6 mo , family size, socio economic state and substance use disorder at the age(20-30y/0 . Finally some childhood and adolescence pathologic factors has association with Substance use disorder at the ages ( 20-30y/5 that these can be used for education all planning , prevention , design high risk group and remedical plans.

  14. The International (Ludwig) Breast Cancer Study Group Trials I-IV: 15 years follow-up.

    Science.gov (United States)

    Castiglione-Gertsch, M; Johnsen, C; Goldhirsch, A; Gelber, R D; Rudenstam, C M; Collins, J; Lindtner, J; Hacking, A; Cortes-Funes, H; Forbes, J

    1994-10-01

    Adjuvant systemic therapy prolongs disease-free and overall survival in both pre- and postmenopausal patients. Available data shown benefit from multi-agent chemotherapy, prolonged tamoxifen treatment, and ovarian ablation, and that the combination of chemo- and endocrine therapy might be advantageous. In 1978 the International (Ludwig) Breast Cancer Study Group (IBCSG) initiated four complementary randomized controlled clinical trials to evaluate the roles of chemo-endocrine combinations or endocrine therapy alone in specific populations defined by risk (for pre- and perimenopausal patients) or by age (for postmenopausal patients). The results at 10 and 13 years' median follow-up for these trials are summarized in this report and are compared to those of the Overview meta-analysis with regard to chemo-endocrine or endocrine therapy combinations. Furthermore, types of first relapses by sites and second malignant diseases are reported. 1601 evaluable patients with node positive disease were included into the studies I-IV. In Trial I (491 premenopausal patients with 1-3 positive axillary nodes) we studied the addition of low-dose continuous prednisone (p) to a cyclophosphamide-methotrexate-fluorouracil (CMF) combination. In Trial II 327 premenopausal patients with four or more positive axillary nodes were randomized to one year CMFp or to a surgical oophorectomy followed by CMFp. In Trial III (463 postmenopausal patients 65 years old or younger), combined chemoendocrine therapy (one year of CMFp plus tamoxifen (T)) was compared to endocrine therapy (1 year of p + T) or to surgery alone. In Trial IV 320 postmenopausal patients 66 to 80 years old were treated either by surgery alone or by surgery followed by 1 year prednisone and tamoxifen. In Trial I the addition of prednisone allowed a higher dose of cytotoxics to be administered compared with CMF alone. Despite this increased dose intensity, 13-year disease-free survival (DFS) and overall survival (OS) were similar

  15. File list: Oth.Emb.10.AllAg.0-4h_embryos [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available Oth.Emb.10.AllAg.0-4h_embryos dm3 TFs and others Embryo 0-4h embryos SRX041388,SRX0...16153,SRX013109,SRX025484 http://dbarchive.biosciencedbc.jp/kyushu-u/dm3/assembled/Oth.Emb.10.AllAg.0-4h_embryos.bed ...

  16. File list: ALL.Emb.50.AllAg.0-4h_embryos [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available ALL.Emb.50.AllAg.0-4h_embryos dm3 All antigens Embryo 0-4h embryos SRX013030,SRX013...RX013103,SRX025484,SRX013031,SRX1426951,SRX013094 http://dbarchive.biosciencedbc.jp/kyushu-u/dm3/assembled/ALL.Emb.50.AllAg.0-4h_embryos.bed ...

  17. RELATIONSHIP BETWEEN INFLATION AND UNEMPLOYMENT IN ROMANIA, AGE GROUP 20-24 YEARS

    Directory of Open Access Journals (Sweden)

    Ortansa T. FLOREA (MOISE

    2014-04-01

    Full Text Available Romania, like many other states, is affected by two major imbalances: inflation and unemployment. The article proposes an analysis of the inflation – unemployment relationship over time and particularly the coverage of this relationship in Romania, considering the age group 20-24 years. In order to identify this relationship, it will be used data from the National Bank of Romania and National Institute of Statistics. Based on the data collected, we will try to trace the Phillips curve. Also, the curve obtained will be analyzed and will try to identify the stage / stages in which it falls, steps taken by the Phillips curve in the postwar period and described by Milton Friedman.

  18. Structural, magnetic and high-temperature thermoelectric properties of La0.4Bi0.4Ca0.2Mn1-xCoxO3 (0 ≤ x ≤ 0.3) perovskites

    Science.gov (United States)

    Hira, Uzma; Sher, Falak

    2018-04-01

    In this study, we have investigated the structural, magnetic and thermoelectric properties of La0.4Bi0.4Ca0.2Mn1-xCoxO3 (0 ≤ x ≤ 0.3) manganites. The crystallographic parameters of samples were determined by the Rietveld refinement of powder X-ray diffraction data. It was observed that Co doping results in change of crystal structures from orthorhombic (space group: Pbnm) to rhombohedral (space group: R-3c) symmetry. Scanning electron microscopy (SEM) images show smooth, clean and densified structures, depicting good crystallinity of samples. The zero field cooled (ZFC) and field cooled (FC) magnetization data were collected in the temperature range 5 to 300 K under an applied magnetic field of 0.1 Tesla. The analysis of temperature dependent magnetization data reveals all samples to be ferromagnetic with Curie temperatures around ∼77 K. The magnetic hysteresis loops, collected at 5 K, show that the saturation magnetization (MS) values decrease from 43 emu/g to 14 emu/g with increase in Co doping. The high temperature thermoelectric properties of all samples are characteristic of a semiconducting behavior, the small polaron hopping model fitting well with the temperature dependent electrical resistivity (ρ) and thermopower (S) data. The thermopower values change sign from positive to negative as temperature is increased from 313 K to 680 K. The maximum thermoelectric power factor (PF = S2/ρ) obtained for x = 0.3 sample at 313 K is 4.60 μW/mK2, is much higher than for the undoped sample.

  19. Prevalence of Dental Caries in 5 – 6 Years and 12 – 13 Years Age Group of School Children of Kathmandu Valley

    Directory of Open Access Journals (Sweden)

    B Subedi

    2011-12-01

    Full Text Available Introduction: Dental caries is one of the most common conditions affecting the general health of children. The present study was carried out among school children of Kathmandu valley to determine the prevalence of dental caries in two age groups. Methods: The study was conducted from December 2007 to May 2008. The age of the school children of the study was divided into two group: 5 - 6 years and 12 - 13 years. A stratifi ed cluster sampling with proportional allocation was used while grouping the subjects. The dental status examination was done with the help of trained dentists. Decayed, missed and fi lled teeth index and decayed, missed and fi lled surfaces index (dmft for primary dentition and DMFT for permanent dentition were used as the standard tools for the determination of prevalence. Results: A total of 638 students (325 of age group 12 - 13 years and 313 of age group 5 - 6 years from 30 different schools of the Kathmandu valley were included in the study. The caries status was found higher in the age group of 5 - 6 years than in the 12 - 13 years and it was found to be statistically signifi cant (p < 0.001. The dmfs and caries percentage of the age group 5 - 6 years and the DMFS and caries percent of the 12 - 13 years was found to be 3.79, 69 % and 1.6, 53.23 % respectively. The dmft/dmfs value was found to be signifi cant according to the districts in the 5 - 6 years age group whereas the DMFS was found statistically signifi cant among the sexes of the 12 - 13 years age group. Conclusions: The caries percentage was found to be above the recommended level of the World Health Organization. However, the DMFS and DMFT values were within the WHO level. Keywords: Children, dental caries, DMF index.

  20. 0.4 THz Photonic-Wireless Link With 106 Gb/s Single Channel Bitrate

    DEFF Research Database (Denmark)

    Jia, Shi; Pang, Xiaodan; Ozolins, Oskars

    2018-01-01

    To accommodate the demand of exponentially increased global wireless data traffic, the prospective data rates for wireless communication in the market place will soon reach 100 Gb/s and beyond. In the lab environment, wireless transmission throughput has been elevated to the level of over 100 Gb....../s attributed to the development of photonic-assisted millimeter wave and terahertz (THz) technologies. However, most of recent demonstrations with over 100 Gb/s data rates are based on spatial or frequency division multiplexing techniques, resulting in increased system's complexity and energy consumption. Here......, we experimentally demonstrate a single channel 0.4 THz photonic-wireless link achieving a net data rate of beyond 100 Gb/s by using a single pair of THz emitter and receiver, without employing any spatial/frequency division multiplexing techniques. The high throughput up to 106 Gb/s within a single...

  1. Measurements of Electron Proton Elastic Cross Sections for 0.4

    International Nuclear Information System (INIS)

    Christy, M.E.; Abdellah Ahmidouch; Christopher Armstrong; John Arrington; Arshak Asaturyan; Steven Avery; Baker, O.; Douglas Beck; Henk Blok; Bochna, C.W.; Werner Boeglin; Peter Bosted; Maurice Bouwhuis; Herbert Breuer; Brown, D.S.; Antje Bruell; Roger Carlini; Nicholas Chant; Anthony Cochran; Leon Cole; Samuel Danagoulian; Donal Day; James Dunne; Dipangkar Dutta; Rolf Ent; Howard Fenker; Fox, B.; Liping Gan; Haiyan Gao; Kenneth Garrow; David Gaskell; Ashot Gasparian; Don Geesaman; Paul Gueye; Mark Harvey; Roy Holt; Xiaodong Jiang; Cynthia Keppel; Edward Kinney; Yongguang Liang; Wolfgang Lorenzon; Allison Lung; Pete Markowitz; Martin, J.W.; Kevin Mcilhany; David Mckee; David Meekins; Miller, M.A.; Richard Milner; Joseph Mitchell; Hamlet Mkrtchyan; Robert Mueller; Alan Nathan; Gabriel Niculescu; Maria-ioana Niculescu; Thomas O'neill; Vassilios Papavassiliou; Stephen Pate; Rodney Piercey; David Potterveld; Ronald Ransome; Joerg Reinhold; Rollinde, E.; Philip Roos; Adam Sarty; Reyad Sawafta; Elaine Schulte; Edwin Segbefia; Smith, C.; Samuel Stepanyan; Steffen Strauch; Vardan Tadevosyan; Liguang Tang; Raphael Tieulent; Alicia Uzzle; William Vulcan; Stephen Wood; Feng Xiong; Lulin Yuan; Markus Zeier; Benedikt Zihlmann; Vitaliy Ziskin

    2004-01-01

    We report on precision measurements of the elastic cross section for electron-proton scattering performed in Hall C at Jefferson Lab. The measurements were made at 28 distinct kinematic settings covering a range in momentum transfer of 0.4 < Q2 < 5.5 (GeV/c)2. These measurements represent a significant contribution to the world's cross section data set in the Q2 range, where a large discrepancy currently exists between the ratio of electric to magnetic proton form factors extracted from previous cross section measurements and that recently measured via polarization transfer in Hall A at Jefferson Lab. This data set shows good agreement with previous cross section measurements, indicating that if a heretofore unknown systematic error does exist in the cross section measurements, then it is intrinsic to all such measurements

  2. Perovskite oxides La0.4Sr0.6CoxMn1-xO3 (x = 0, 0.2, 0.4 as an effective electrocatalyst for lithium—air batteries

    Directory of Open Access Journals (Sweden)

    Yajun Zhao

    2018-01-01

    Full Text Available Co-doped perovskite oxide La0.4Sr0.6CoxMn1-xO3 (x = 0, 0.2, 0.4 composites are prepared by sol–gel method utilizing citric acid as chelating agent. These composites show good catalytic activities when tested as catalysts rechargeable lithium—air batteries. In particular, the La0.4Sr0.6Co0.4Mn0.6O3 shows a lower potential gap. When these samples are tested as catalysts for Li—air batteries at a current density of 100 mA g−1, the discharge capacities with different La0.4Sr0.6CoxMn1-xO3 (x = 0, 0.2, 0.4 catalysts are 5819, 6420, and 7227 mA h g−1, respectively. In addition, under a capacity limitation of 1000 mA h g−1, the cell using La0.4Sr0.6Co0.4Mn0.6O3 as catalyst shows good cycling stability up to 46 cycles. The good electrochemical performance suggests that suitable doping of Co in Mn site of La0.4Sr0.6MnO3 could be a promising route to improve the catalytic activity.

  3. ON THE FERMI -GBM EVENT 0.4 s AFTER GW150914

    Energy Technology Data Exchange (ETDEWEB)

    Greiner, J.; Yu, H.-F. [Max Planck Institute for Extraterrestrial Physics, Giessenbachstrasse, D-85748 Garching (Germany); Burgess, J. M. [Oskar Klein Centre for Cosmoparticle Physics, SE-106 91 Stockholm (Sweden); Savchenko, V., E-mail: jcg@mpe.mpg.de, E-mail: sptfung@mpe.mpg.de, E-mail: jamesb@kth.se, E-mail: savchenk@apc.in2p3.fr [Francois Arago Centre, APC, Université Paris Diderot, CNRS/IN2P3, CEA/Irfu, Observatoire Paris, Sorbonne Paris Cité, 10 rue Alice Domon et Léonie Duquet, F-75205 Paris Cedex 13 (France)

    2016-08-20

    In view of the recent report by Connaughton et al., we analyze continuous time-tagged event (TTE) data of Fermi -gamma-ray burst monitor (GBM) around the time of the gravitational-wave event GW 150914. We find that after proper accounting for low-count statistics, the GBM transient event at 0.4 s after GW 150914 is likely not due to an astrophysical source, but consistent with a background fluctuation, removing the tension between the INTEGRAL /ACS non-detection and GBM. Additionally, reanalysis of other short GRBs shows that without proper statistical modeling the fluence of faint events is over-predicted, as verified for some joint GBM–ACS detections of short GRBs. We detail the statistical procedure to correct these biases. As a result, faint short GRBs, verified by ACS detections, with significances in the broadband light curve even smaller than that of the GBM–GW150914 event are recovered as proper non-zero source, while the GBM–GW150914 event is consistent with zero fluence.

  4. AEGIS: THE MORPHOLOGIES OF GREEN GALAXIES AT 0.4 < z < 1.2

    International Nuclear Information System (INIS)

    Mendez, Alexander J.; Coil, Alison L.; Moustakas, John; Lotz, Jennifer; Salim, Samir; Simard, Luc

    2011-01-01

    We present quantitative morphologies of ∼300 galaxies in the optically defined green valley at 0.4 20 . We find that the green galaxy population is intermediate between the red and blue galaxy populations in terms of concentration, asymmetry, and morphological type and merger fraction estimated using Gini/M 20 . We find that most green galaxies are not classified as mergers; in fact, the merger fraction in the green valley is lower than in the blue cloud. We show that at a given stellar mass, green galaxies have higher concentration values than blue galaxies and lower concentration values than red galaxies. Additionally, we find that 12% of green galaxies have B/T = 0 and 21% have B/T ≤ 0.05. Our results show that green galaxies are generally massive (M * ∼ 10 10.5 M sun ) disk galaxies with high concentrations. We conclude that major mergers are likely not the sole mechanism responsible for quenching star formation in this population and that either other external processes or internal secular processes play an important role both in driving gas toward the center of these galaxies and in quenching star formation.

  5. File list: His.Emb.20.AllAg.0-4h_embryos [Chip-atlas[Archive

    Lifescience Database Archive (English)

    Full Text Available His.Emb.20.AllAg.0-4h_embryos dm3 Histone Embryo 0-4h embryos SRX013030,SRX013003,S...RX013029,SRX013103,SRX1426953,SRX1426951,SRX013031,SRX013094 http://dbarchive.biosciencedbc.jp/kyushu-u/dm3/assembled/His.Emb.20.AllAg.0-4h_embryos.bed ...

  6. Discovery of nine extended ionized gas clouds in a z = 0.4 cluster

    International Nuclear Information System (INIS)

    Yagi, Masafumi; Koyama, Yusei; Kodama, Tadayuki; Gu, Liyi; Nakata, Fumiaki; Hattori, Takashi; Yoshida, Michitoshi

    2015-01-01

    From deep Hα imaging data of Suprime-Cam/Subaru, we discovered nine extended ionized gas clouds (EIG) around galaxies in the Abell 851 cluster (A851) at z = 0.4. We surveyed a 30 × 25 arcmin region, and the EIGs were found only near the cluster center (<2.3 arcmin ∼ 750 kpc). The parent galaxies of the EIGs are star-forming or post-starburst galaxies, all of which are spectroscopically confirmed members of the cluster. Four out of the nine parent galaxies show distortion of stellar distribution in the disk, which can be a sign of recent interaction, and the interaction may have made the EIGs. On the other hand, six parent galaxies (one overlaps those exhibiting distortion) show Hα emission without stars, which implies ram pressure stripping. The spectrum of the brightest parent galaxy shows a post-starburst signature and resembles the Hα stripped galaxies found in the Coma cluster. Meanwhile, two brightest parent galaxies in A851 are more massive than the EIG parent galaxies in the Coma cluster. This is consistent with a “downsizing” of star-forming galaxies, though it is still within the statistical variance. We also analyzed Suprime-Cam data of another z=0.39 cluster, CL0024+17, but found no EIGs. The key difference between A851 and CL0024+17 would be the existence of a subcluster colliding with the main body of A851, in which six or seven out of the nine parent galaxies in A851 exist, and the fraction of EIGs in the subcluster is significantly higher than the main subcluster of A851 and CL0024+17.

  7. Discovery of nine extended ionized gas clouds in a z = 0.4 cluster

    Energy Technology Data Exchange (ETDEWEB)

    Yagi, Masafumi; Koyama, Yusei; Kodama, Tadayuki [Optical and Infrared Astronomy Division, National Astronomical Observatory of Japan, 2-21-1, Osawa, Mitaka, Tokyo, 181-8588 (Japan); Gu, Liyi [Research Center for the Early Universe, School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0011 (Japan); Nakata, Fumiaki; Hattori, Takashi [Subaru Telescope, 650 North A' ohoku Place, Hilo, HI 96720 (United States); Yoshida, Michitoshi, E-mail: YAGI.Masafumi@nao.ac.jp [Hiroshima Astrophysical Science Center, Hiroshima University, 1-3-1, Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8526 (Japan)

    2015-02-01

    From deep Hα imaging data of Suprime-Cam/Subaru, we discovered nine extended ionized gas clouds (EIG) around galaxies in the Abell 851 cluster (A851) at z = 0.4. We surveyed a 30 × 25 arcmin region, and the EIGs were found only near the cluster center (<2.3 arcmin ∼ 750 kpc). The parent galaxies of the EIGs are star-forming or post-starburst galaxies, all of which are spectroscopically confirmed members of the cluster. Four out of the nine parent galaxies show distortion of stellar distribution in the disk, which can be a sign of recent interaction, and the interaction may have made the EIGs. On the other hand, six parent galaxies (one overlaps those exhibiting distortion) show Hα emission without stars, which implies ram pressure stripping. The spectrum of the brightest parent galaxy shows a post-starburst signature and resembles the Hα stripped galaxies found in the Coma cluster. Meanwhile, two brightest parent galaxies in A851 are more massive than the EIG parent galaxies in the Coma cluster. This is consistent with a “downsizing” of star-forming galaxies, though it is still within the statistical variance. We also analyzed Suprime-Cam data of another z=0.39 cluster, CL0024+17, but found no EIGs. The key difference between A851 and CL0024+17 would be the existence of a subcluster colliding with the main body of A851, in which six or seven out of the nine parent galaxies in A851 exist, and the fraction of EIGs in the subcluster is significantly higher than the main subcluster of A851 and CL0024+17.

  8. Efficacy of ferterra 0.4% GR (chlorantraniliprole) against stem borers and leaffolder insect-pests of basmati rice.

    Science.gov (United States)

    Sarao, P S; Kaur, H

    2014-09-01

    Field experiments were conducted during three kharif seasons from 2009 to 2011 at Sudhar village, Ludhiana and Rice Research Area of Department of Plant Breeding and Genetics, Punjab Agricultural University, Ludhiana. Four doses of Ferterra 0.4% GR (chlorantraniliprole) a new chemistry @ 20, 30, 40 and 50 g a.i. ha(-1) and standard check Cartap hydrochloride 4 G @ 1000 g a.i. ha(-1) was tested against stem borers and leaffolder infesting basmati rice. Over the years, dead heart in all the Ferterra doses and standard check (1.01-1.80%) were at par70 DAT, whereas, at 80 DAT doses @ 40, 50 and standard check were at par (1.04-1.13%) but significantly better than lower doses and untreated control. Similarly, over the years, Ferterra doses @ 40 and 50 g a.i. ha(-1) was significantly better than control in reducing white ear incidence, whereas, at 30 g a.i. ha(-1) and standard check intermediately reduced the white ears incidence. Leaffolder infestation at all the Ferterra doses were at par with standard check 70 DAT (2.69-3.87%), whereas, 80 DAT, Ferterra doses @ 30, 40, 50 and standard check were at par (2.95-3.49%) but significantly better than lower dose and untreated control. Over the years the cost : benefit ratio was maximum (1 : 23.67) in the Ferterra @40 g a.i. ha(-1) dose followed by 50 g a.i. ha(-1) dose.

  9. A Psychodynamic Approach on Group Career Counseling: A Brazilian Experience of 40 Years

    Science.gov (United States)

    Lehman, Yvette Piha; Ribeiro, Marcelo Afonso; da Conceição Coropos Uvaldo, Maria; da Silva, Fabiano Fonseca

    2015-01-01

    Career guidance and career counselling have traditionally been conducted in an individualized fashion focusing on the counsellor-client relationship. Specialized literature, however, points to the potential use of group strategies. This article seeks to contribute to the advancement of studies in group career counselling practices, by introducing…

  10. Exploratory Talk in the Early Years: Analysing Exploratory Talk in Collaborative Group Activities Involving Younger Learners

    Science.gov (United States)

    Patterson, Eira Wyn

    2018-01-01

    Collaborative group work has the potential for providing rich opportunities for children to learn through talk with peers; however, in practice, little effective engagement in learning is observed within authentic learning contexts. Exploratory talk is associated with high levels of cognitive challenge within collaborative group work. Detailed…

  11. Volume Replacement Therapy during Hip Arthroplasty using Hydroxyethyl Starch (130/0.4 Compared to Lactated Ringer Decreases Allogeneic Blood Transfusion and Postoperative Infection

    Directory of Open Access Journals (Sweden)

    Adilson Hamaji

    2013-01-01

    Full Text Available Background and objectives: Hydroxyethyl starch (HES 130/0.4 is considered an effective plasma expander when compared to crystalloids. There is controversy around its superiority regarding hemodynamic optimization and about possible detrimental effects on coagulation. The aim of this study was to compare the effects of HES 130/0.4 to lactated Ringer solution during hip arthroplasty in adult patients under spinal anesthesia regarding intraoperative bleeding, hemodynamic parameters, coagulation profile, transfusion requirements and clinical outcomes. Methods: In this randomized, controlled trial, 48 patients scheduled for hip arthroplasty with spinal anesthesia were randomized into two groups: 24 patients were allocated to receive a preload of 15 mL.kg-1 of HES 130/0.4 and 24 patients received a preload of 30 mL.kg-1 lactated Ringer solution before surgery. Hemodynamic measurements, hemoglobin concentrations, biochemical parameters and coagulation tests were evaluated in three periods during surgical procedure. Patients received medical follow-up during their hospital stay and up to postoperative 30 days. Primary outcome was the requirement of red blood cell transfusion between groups during hospital stay. Secondary outcome were hemodynamic parameters, length of hospital stay, mortality and occurrence of clinical postoperative complications. Results: Red blood cell transfusion was required in 17% of patients in the HES group and in 46% in the Ringer group (p = .029. Postoperative infections were more frequently observed in the Ringer group (17% compared to the HES group (0, p = .037. There were no significant differences between groups in mortality, hospital length of stay and clinical complications other than infection. Conclusions: During hip arthroplasty, patients treated with hypervolemic hemodilution with hydroxyethyl starch 130/0.4 required less transfusion and presented lower infection rate compared to patients who received lactated

  12. An Example of Large-group Drama and Cross-year Peer Assessment for Teaching Science in Higher Education

    Science.gov (United States)

    Sloman, Katherine; Thompson, Richard

    2010-09-01

    Undergraduate students pursuing a three-year marine biology degree programme (n = 86) experienced a large-group drama aimed at allowing them to explore how scientific research is funded and the associated links between science and society. In the drama, Year 1 students played the "general public" who decided which environmental research areas should be prioritised for funding, Year 2 students were the "scientists" who had to prepare research proposals which they hoped to get funded, and Year 3 students were the "research panel" who decided which proposals to fund with input from the priorities set by the "general public". The drama, therefore, included an element of cross-year peer assessment where Year 3 students evaluated the research proposals prepared by the Year 2 students. Questionnaires were distributed at the end of the activity to gather: (1) student perceptions on the cross-year nature of the exercise, (2) the use of peer assessment, and (3) their overall views on the drama. The students valued the opportunity to interact with their peers from other years of the degree programme and most were comfortable with the use of cross-year peer assessment. The majority of students felt that they had increased their knowledge of how research proposals are funded and the perceived benefits of the large-group drama included increased critical thinking ability, confidence in presenting work to others, and enhanced communication skills. Only one student did not strongly advocate the use of this large-group drama in subsequent years.

  13. First year nursing students’ experiences of social media during the transition to university: a focus group study

    OpenAIRE

    Moorley, CR

    2016-01-01

    Background: Social media platforms are useful for creating communities, which can then be utilised as a mean for supportive, professional and social learning. Objective: To explore first year nursing student experiences with social media in supporting student transition and engagement into higher education. Design: Qualitative focus groups. Methods: Ten 1st yearBachelor of Nursing students were included in three face-to-face focus groups. Data were analysed using qualitative thematic content ...

  14. The Influence of Group Training in the Incredible Years Teacher Classroom Management Program on Preschool Teachers' Classroom Management Strategies

    Science.gov (United States)

    Carlson, John S.; Tiret, Holly B.; Bender, Stacy L.; Benson, Laurie

    2011-01-01

    This study examined changes in preschool teachers' perceptions of classroom management strategies following group training in the recently revised Incredible Years Teacher Classroom Management Program (C. Webster-Stratton, 2006). The authors used a pre/post follow-up design across 2 groups that each met for 8 sessions over an 8-10-week period for…

  15. Using Student Learning and Development Outcomes to Evaluate a First-Year Undergraduate Group Video Project

    Science.gov (United States)

    Jensen, Murray; Mattheis, Allison; Johnson, Brady

    2012-01-01

    Students in an interdisciplinary undergraduate introductory course were required to complete a group video project focused on nutrition and healthy eating. A mixed-methods approach to data collection involved observing and rating video footage of group work sessions and individual and focus group interviews. These data were analyzed and used to evaluate the effectiveness of the assignment in light of two student learning outcomes and two student development outcomes at the University of Minnesota. Positive results support the continued inclusion of the project within the course, and recommend the assignment to other programs as a viable means of promoting both content learning and affective behavioral objectives. PMID:22383619

  16. Effect of mother support groups on nutritional status in children under two years of age in Laisamis village, Kenya

    OpenAIRE

    Undlien, Mattias; Viervoll, Håvard-Amund

    2016-01-01

    Background: To deal with the ongoing malnutrition problem in many parts of Kenya, the government has initialized preventive actions such as mother support groups to improve health and nutrition among children. Few studies have evaluated the effectiveness of such interventions as mother support groups. Objective: This study aimed at determining how mother support groups affect the nutrition status of children under 2 years of age. Methods: A total of 41 children participated. Anthropometric me...

  17. Industrial Informatics & Signal Processing Research Group (iisp) 1995 -2015 - celebrating 50 years of engineering at Sussex University

    OpenAIRE

    Chatwin, Chris; Young, Rupert; Birch, Philip; Yang, Tai

    2015-01-01

    The presentation gives a partial summary of some of the research conducted by the Industrial Informatics & Signal Processing Research Group over the last 20 years. This was to celebrate 50 years of Engineering at Sussex University; many of our past graduates attended. The conference was a great success and culminated in a very enjoyable dinner with all the delegates and presenters.

  18. Effect of mother support groups on nutritional status in children under two years of age in Laisamis village, Kenya.

    Science.gov (United States)

    Undlien, Mattias; Viervoll, Håvard-Amund; Rostad, Berit

    2016-12-01

    In tackling the ongoing malnutrition problem in many parts of Kenya, the government has initialized preventive actions such as mother support groups in order to improve health and nutrition among children. Few studies have evaluated the effectiveness of such intervention. This study aimed at determining how mother support groups affect the nutrition status of children under 2 years of age. 41 children participated. Anthropometric measurements were taken of the children once a month during 12 months. Medical history, nutrition status and socioeconomic factors were collected by interviews with the mothers. The children were divided into two groups depending on their mother's assigned group; mother support group or not. Nutritional status was significantly better among children in the mother support group (P=0.001). There were significantly more children with severe acute malnutrition among the children not in support group (P=0.040). The mean height (P=0.001) and mean weight (P=0.0281) were significantly higher among children in the non-support group. Mother support groups may have a beneficial effect on the nutritional status of children under 2 years of age. Cases of severe acute malnutrition seemed to be less prevalent in children whose mothers attend mother support groups.

  19. 26 CFR 1.1502-76 - Taxable year of members of group.

    Science.gov (United States)

    2010-04-01

    ... that S is a member of the second group. Ratable allocation is not a method of accounting, and ratable... without the application of any other rules of law); (2) Any item from the disposition or abandonment of property used in a trade or business as defined in section 1231(b) (determined without the application of...

  20. Annual activity report of Ignalina NPP Safety Analysis Group for 1995 year

    International Nuclear Information System (INIS)

    Ushpuras, E.; Augutis, J.; Bubelis, E.

    1995-01-01

    The main results of Ignalina NPP Safety Analysis Group (ISAG) investigations for 1995 are presented. ISAG is concentrating its research activities into four areas: the neutrons dynamics modelling, simulation of transient processes during loss of coolant accident, the reactor cooling systems modelling and the probabilistic safety assessment of accident confinement system. 18 refs., 9 tabs., 110 figs

  1. Annual activity report of Ignalina NPP Safety Analysis Group for 1994 year

    International Nuclear Information System (INIS)

    Ushpuras, E.; Kaliatka, A.; Chesna, B.; Dundulis, G.

    1995-01-01

    The main results of Ignalina NPP Safety Analysis Group (ISAG) investigations for 1994 are presented. ISAG is concentrated its research activities into 3 areas: the neutrons dynamics modeling, simulation of transient processes during loss of coolant accident and calculation of reactor building structure's streses and other mechanical properties in the case of accident. 6 refs., 13 tabs., 69 figs

  2. Yearly stepwise increments of the growth hormone dose results in a better growth response after four years in girls with Turner syndrome. Dutch Working Group on Growth Hormone

    NARCIS (Netherlands)

    van Teunenbroek, A.; de Muinck Keizer-Schrama, S. M.; Stijnen, T.; Jansen, M.; Otten, B. J.; Delemarre-van de Waal, H. A.; Vulsma, T.; Wit, J. M.; Rouwé, C. W.; Reeser, H. M.; Gosen, J. J.; Rongen-Westerlaken, C.; Drop, S. L.

    1996-01-01

    To optimize the growth promoting effect of growth hormone (GH), 65 previously untreated girls with Turner syndrome (TS), chronological age (CA) 2-11 yr, were randomized into 3 dosage regimen groups: A, B, and C, with a daily recombinant-human GH dose during 4 study years of 4-4-4-4, 4-6-6-6, and

  3. Using group learning to promote integration and cooperative learning between Asian and Australian second-year veterinary science students.

    Science.gov (United States)

    Mills, Paul C; Woodall, Peter F; Bellingham, Mark; Noad, Michael; Lloyd, Shan

    2007-01-01

    There is a tendency for students from different nationalities to remain within groups of similar cultural backgrounds. The study reported here used group project work to encourage integration and cooperative learning between Australian students and Asian (Southeast Asian) international students in the second year of a veterinary science program. The group project involved an oral presentation during a second-year course (Structure and Function), with group formation engineered to include very high, high, moderate, and low achievers (based on previous grades). One Asian student and three Australian students were placed in each group. Student perceptions of group dynamics were analyzed through a self-report survey completed at the end of the presentations and through group student interviews. Results from the survey were analyzed by chi-square to compare the responses between Asian and Australian students, with statistical significance accepted at p learning experience. Asian students expressed a greater preference for working in a group than for working alone (p = 0.001) and reported more frequently than Australian students that teamwork produces better results (p = 0.01). Australian students were more likely than Asian students to voice their opinion in a team setting (p = 0.001), while Asian students were more likely to depend on the lecturer for directions (p = 0.001). The results also showed that group project work appeared to create an environment that supported learning and was a successful strategy to achieve acceptance of cultural differences.

  4. A state of acquired IL-10 deficiency in 0.4% of Danish blood donors

    DEFF Research Database (Denmark)

    de Lemos Rieper, Carina; Galle, Pia; Pedersen, Bente Klarlund

    2010-01-01

    Autoantibodies against a variety of growth factors and cytokines are present in preparations of pooled normal human IgG, such as IVIg. The present study demonstrated that healthy Danish blood donors produced high concentrations of anti-IL-10 IgG antibodies that bound IL-10 with extremely high...... in highly diluted plasma samples, providing the explanation for the fact that relatively low antibody activity can be detected in normal human pooled IgG, derived from the plasma of over 1000 blood donors....... family (IL-19, IL-20, IL-22, IL-24, IL-26, IL-28A, IL-28B, IL-29). The production of anti-IL-10 antibodies was stable from months to years, and high positive donors were likely to acquire a state of IL-10 deficiency in the circulation during this period. Anti-IL-10 antibodies were readily measurable even...

  5. Gap Year Students in Lithuania: The Value Orientations of Children from Wealthy Social Groups

    Science.gov (United States)

    Leonavicius, Vylius; Ozolinciute, Egle

    2015-01-01

    The paper seeks to understand the trajectories of students who defer entry to university. The study was conducted in Lithuania, a former Soviet Union republic. The phenomenon of a "gap year" is usually associated with young people, who decide not to enter higher education schools immediately after receiving secondary education, instead…

  6. The Work Values of First-Year College Students: Exploring Group Differences

    Science.gov (United States)

    Duffy, Ryan D.; Sedlacek, William E.

    2007-01-01

    A sample of 3,570 first-year college students were surveyed regarding the factors they deemed most important to their long-term career choice. Students as a whole identified intrinsic interest, high salary, contributions to society, and prestige as their 4 most important work values. Additional analyses found men more likely to espouse extrinsic…

  7. Spirometry in an unselected group of 6-year-old children

    DEFF Research Database (Denmark)

    Kjaer, Henrik Fomsgaard; Eller, Esben; Bindslev-Jensen, Carsten

    2008-01-01

    birth cohort study. Children with known asthma, possible asthma and a control group also performed bronchodilator measurements. At least two acceptable flow-volume curves at baseline were obtained by 368/404 children (91%). The two best values for FEV1 and FVC were within 5% of each other in 88% and 83...... in Delta FEV1(mean) between healthy children and children with asthma (3.1% vs. 6.1%, P

  8. Annual activity report of Ignalina NPP Safety Analysis Group for 1996 year

    International Nuclear Information System (INIS)

    Ushpuras, E.; Augutis, J.; Bubelis, E.

    1997-03-01

    The main results of Ignalina NPP Safety Analysis Group (ISAG) investigations for 1996 are presented. ISAG is concentrating its research activities into four areas: the neutrons dynamics modelling, simulation of transient processes during loss of coolant accident, the reactor cooling systems modelling and the probabilistic safety assessment of accident confinement system. Ignalina Safety Analysis Report was prepared on the basis of these results. 37 refs., 9 tabs., 96 figs

  9. A peer mentoring group for junior clinician educators: four years' experience.

    Science.gov (United States)

    Lord, Julie A; Mourtzanos, Emmanuel; McLaren, Kimberly; Murray, Suzanne B; Kimmel, Ryan J; Cowley, Deborah S

    2012-03-01

    To study the effect of a peer mentoring group (PMG). Six junior clinician educator faculty and one senior faculty at the University of Washington Medical Center's Department of Psychiatry formed a PMG in 2006. The PMG had 30 meetings during 2006-2010. Group format, goals, and meeting agendas were determined solely by participants. Feedback about positive and negative outcomes of participation in the PMG was determined by open-ended response to three sets of questions; qualitative analysis was performed by an outside research consultant. Program evaluation revealed benefits and undesirable or unintended outcomes. Reported benefits were increased workplace satisfaction; improved social connection; increased professional productivity and personal growth/development through accountability, collaboration, mutual learning, support, and information sharing; synergy, collaboration, and diversity of thought; increased involvement in professional activities; opportunity for peer discussions in a safe environment; and increased accountability and motivation. Undesirable or unintentional outcomes were exclusivity, lack of hierarchy, scheduling of meetings, absence of an intentional curriculum, diverse and competing interests, personal-professional enmeshment, and occasional loss of focus due to overemphasis on personal matters. Every member of the PMG was retained, and scholarly productivity increased, as did collaboration with other group members. Participants in this PMG experienced qualitative benefits and perceived advantages in career advancement and scholarly productivity. Negative consequences did not deter participation in the PMG or outweigh benefits. The self-sufficient and low-cost structure makes it particularly portable.

  10. Single Channel 106 Gbit/s 16QAM Wireless Transmission in the 0.4 THz Band

    DEFF Research Database (Denmark)

    Pang, Xiaodan; Jia, Shi; Ozolins, Oskars

    2017-01-01

    We experimentally demonstrate a single channel 32-GBd 16QAM THz wireless link operating in the 0.4 THz band. Post-FEC net data rate of 106 Gbit/s is successfully achieved without any spatial/frequency multiplexing.......We experimentally demonstrate a single channel 32-GBd 16QAM THz wireless link operating in the 0.4 THz band. Post-FEC net data rate of 106 Gbit/s is successfully achieved without any spatial/frequency multiplexing....

  11. Degree and duration of corneal anesthesia after topical application of 0.4% oxybuprocaine hydrochloride ophthalmic solution in ophthalmically normal dogs.

    Science.gov (United States)

    Douet, Jean-Yves; Michel, Julien; Regnier, Alain

    2013-10-01

    To assess the anesthetic efficacy and local tolerance of topically applied 0.4% oxybuprocaine ophthalmic solution to in dogs and compare its effects with those of 1% tetracaine solution. 34 ophthalmically normal Beagles. Dogs were assigned to 2 groups, and baseline corneal touch threshold (CTT) was measured bilaterally with a Cochet-Bonnet aesthesiometer. Dogs of group 1 (n = 22) received a single drop of 0.4% oxybuprocaine ophthalmic solution in one eye and saline (0.9% NaCl) solution (control treatment) in the contralateral eye. Dogs of group 2 (n = 12) received a single drop of 0.4% oxybuprocaine ophthalmic solution in one eye and 1% tetracaine ophthalmic solution in the contralateral eye. The CTT of each eye was measured 1 and 5 minutes after topical application and then at 5-minute intervals until 75 minutes after topical application. CTT changes over time differed significantly between oxybuprocaine-treated and control eyes. After instillation of oxybuprocaine, maximal corneal anesthesia (CTT = 0) was achieved within 1 minute, and CTT was significantly decreased from 1 to 45 minutes, compared with the baseline value. No significant difference in onset, depth, and duration of corneal anesthesia was found between oxybuprocaine-treated and tetracaine-treated eyes. Conjunctival hyperemia and chemosis were detected more frequently in tetracaine-treated eyes than in oxybuprocaine-treated eyes. Topical application of oxybuprocaine and tetracaine similarly reduced corneal sensitivity in dogs, but oxybuprocaine was less irritating to the conjunctiva than was tetracaine.

  12. The Chernobyl reactor accident, ten years on. Teaching projects for mathematics instruction in interdisciplinary working groups

    International Nuclear Information System (INIS)

    Boer, H.; Delle, E.; Mies, K.; Warmeling, A.

    1996-01-01

    The booklet presents background information and addresses the following aspects: ionizing radiation and radiation effects; safety of German nuclear power plants; statistical evidence of radiation injuries; short-lived and long-lived ionizing radiation; radioactive waste; CO 2 emissions as an argument in favour of nuclear power generation. The material presented is intended for use by a school project team interested in the subjects, or as a basis for collaborative, interdisciplinary teaching in working groups, and it offers information and problems for mathematics teaching. (HP) [de

  13. 15 years of existence of the International Consultative Group on Food Irradiation (ICGFI)

    International Nuclear Information System (INIS)

    Ehlermann, D.A.E.

    1999-01-01

    The ICGFI essentially contributed to international dissemination of unbiased information about the advantages and risks of food irradiation. The body has issued ICGFI publications containing codes of good practice for a variety of purposes, as eg. for operation of irradiation facilities for the treatment of food (GIP), or guidelines for due handling of irradiated food (GMP). Training courses have been offered to scientists, especially from developing countries, as well as for inspectors of national supervisory authorities. The activities of the advisory group as well as the conditions governing future activities are discussed. (orig./CB) [de

  14. Properties of Mn0.4Zn0.6Fe2O4 and Mn0.6Zn0.4Fe2O4 as Nanocatalyst for Ammonia Production

    Directory of Open Access Journals (Sweden)

    Puspitasari Poppy

    2017-01-01

    Full Text Available Ammonia synthesis requires high pressure and high temperature process. Unfortunately, the capital intensive cost resulting low yield of ammonia by using recent catalyst which is iron oxide. Therefore, manganese zinc ferrite as a soft ferrite material will be introduced as a new nanocatalyst to enhance the ammonia yield. As a new nanocatalyst for ammonia production, study of comparasion two different concentration of MnZn Ferrite is very important. This paper will compare the yield of ammonia by using two different nanocatalyst which are Mn0.4Zn0.6Fe2O4 and Mn0.6Zn0.4Fe2O4. Both were synthesized by sol-gel method and has been characterize by using FESEM (morphology, XRD (phase identification, EDX (elemental analysis and TPR (oxide reduction. The ammonia was produce with and without magnetic field applied. The result shows that the ammonia yield is higher for Mn0.4Zn0.6Fe2O4 nanocatalyst than Mn0.6Zn0.4Fe2O4 by using magnetic field applied. 67.2% of yield has been achieved by using new nanocatalyst Mn0.6Zn0.4Fe2O4 and magnetic field applied at ambient environment.

  15. Urinary incontinence during pregnancy and 1 year after delivery in primiparous women compared with a control group of nulliparous women

    DEFF Research Database (Denmark)

    Hansen, Bent Brandt; Svare, Jens; Viktrup, Lars

    2012-01-01

    , the prevalence of any type of urinary incontinence in the primiparous group was 32.1%, compared to 13.8% in the control group. Adjusted OR¿=¿3.3 (95%CI¿=¿2.4-4.4). One year after delivery, the prevalence in the primiparous group was 29.3%, compared to 16.6% in the control group. Adjusted OR¿=¿2.5 (95%CI¿=¿1......AIMS: To investigate the impact of the first pregnancy and delivery on the prevalence and types of urinary incontinence during pregnancy and 1 year after delivery. METHODS: The study was a prospective cohort study with a control group. Primiparous women, who delivered in our department from June...... 2003 to July 2005, participated. The women filled out a questionnaire 2-3 days after the delivery and a new questionnaire after 1 year. The questionnaires comprised basic characteristics and symptoms of urinary incontinence. An attempted age-matched control group of nulliparous women was included...

  16. Intracluster light in clusters of galaxies at redshifts 0.4 < z < 0.8

    Science.gov (United States)

    Guennou, L.; Adami, C.; Da Rocha, C.; Durret, F.; Ulmer, M. P.; Allam, S.; Basa, S.; Benoist, C.; Biviano, A.; Clowe, D.; Gavazzi, R.; Halliday, C.; Ilbert, O.; Johnston, D.; Just, D.; Kron, R.; Kubo, J. M.; Le Brun, V.; Marshall, P.; Mazure, A.; Murphy, K. J.; Pereira, D. N. E.; Rabaça, C. R.; Rostagni, F.; Rudnick, G.; Russeil, D.; Schrabback, T.; Slezak, E.; Tucker, D.; Zaritsky, D.

    2012-01-01

    Context. The study of intracluster light (ICL) can help us to understand the mechanisms taking place in galaxy clusters, and to place constraints on the cluster formation history and physical properties. However, owing to the intrinsic faintness of ICL emission, most searches and detailed studies of ICL have been limited to redshifts z DAFT/FADA Survey. Methods: We analyze the ICL by applying the OV WAV package, a wavelet-based technique, to deep HST ACS images in the F814W filter and to V-band VLT/FORS2 images of three clusters. Detection levels are assessed as a function of the diffuse light source surface brightness using simulations. Results: In the F814W filter images, we detect diffuse light sources in all the clusters, with typical sizes of a few tens of kpc (assuming that they are at the cluster redshifts). The ICL detected by stacking the ten F814W images shows an 8σ detection in the source center extending over a ~50 × 50 kpc2 area, with a total absolute magnitude of -21.6 in the F814W filter, equivalent to about two L∗ galaxies per cluster. We find a weak correlation between the total F814W absolute magnitude of the ICL and the cluster velocity dispersion and mass. There is no apparent correlation between the cluster mass-to-light ratio (M/L) and the amount of ICL, and no evidence of any preferential orientation in the ICL source distribution. We find no strong variation in the amount of ICL between z = 0 and z = 0.8. In addition, we find wavelet-detected compact objects (WDCOs) in the three clusters for which data in two bands are available; these objects are probably very faint compact galaxies that in some cases are members of the respective clusters and comparable to the faint dwarf galaxies of the Local Group. Conclusions: We show that the ICL is prevalent in clusters at least up to redshift z = 0.8. In the future, we propose to detect the ICL at even higher redshifts, to determine wether there is a particular stage of cluster evolution where it

  17. Use of the gamma radiation, in a dose of 0,4 kGy, on the storage temperature reduction of the banana nanica

    International Nuclear Information System (INIS)

    Manoel, Luciana; Vieites, Rogerio Lopes

    2009-01-01

    The aim was to evaluate the use of gamma radiation, in a dose of 0,4 kGy, on the storage temperature reduction of the banana 'Nanica'. The bananas 'Nanica' were harvested in the Arm Taperao, Brotas (SP) town, and sent to CBE (Companhia Brasileira de Esterilizacao-Cotia-SP) for irradiation and constitution of the following treatments: T1 (fruits irradiated at 0,4 kGy and stored at 16 ±1 deg C); T2 (fruits irradiated at 0,4 kGy and stored at 14 ±1 deg C); T3 (fruit irradiated ata 0,4 kGy and stored at 12±1 deg C); T4 (fruits non-irradiated and stored at 16±1 deg C); T5 (fruits non-irradiated and stored at 14±1 deg C) and T6 (fruits non-irradiated and stored at 12±1 deg C). The fruits were stored in B.O.Ds. of the Agroindustrial Management and Technology Department, with a relative humidity of 80±5%. The experiment was divided in two groups: control group (post harvest conservation and disease incidence) and parcel group (soluble solids and pulp/peel). The analyses were performed in intervals of five days during a period of 25 days. The experimental design employed was completely randomized (DIC) by applying a factor of 2 x 3 x 6 (irradiation x temperature x time). The Tukey test with 5% of probability was used for comparison between means. The storage temperature of the bananas 'Nanica' was not reduce by irradiation. (author)

  18. Sing Your Lungs Out-a community singing group for chronic obstructive pulmonary disease: a 1-year pilot study.

    Science.gov (United States)

    McNaughton, Amanda; Weatherall, Mark; Williams, Mathew; McNaughton, Harry; Aldington, Sarah; Williams, Gayle; Beasley, Richard

    2017-01-24

    Singing group participation may benefit patients with chronic obstructive pulmonary disease (COPD). Previous studies are limited by small numbers of participants and short duration of generally hospital-based singing group intervention. This study examines the feasibility of long-term participation in a community singing group for patients with COPD who had completed pulmonary rehabilitation (PR). This was a feasibility cohort study. Patients with COPD who had completed PR and were enrolled in a weekly community exercise group were recruited to a new community-based singing group which met weekly for over 1 year. Measurements at baseline, 4 months and 1 year comprised comprehensive pulmonary function tests including lung volumes, 6 min walk test (6MWT), Clinical COPD Questionnaire (CCQ), Hospital Anxiety and Depression Scale (HADS) and hospital admission days for acute exacerbation of COPD (AECOPD) for 1 year before and after the first singing group session. There were 28 participants with chronic lung disease recruited from 140 people approached. Five withdrew in the first month. 21 participants meeting Global Initiative for Chronic Obstructive Lung Disease criteria for COPD completed 4-month and 18 completed 1-year assessments. The mean attendance was 85%. For the prespecified primary outcome measure, total HADS score, difference between baseline and 12 months was -0.9, 95% CI -3.0 to 1.2, p=0.37. Of the secondary measures, a significant reduction was observed for HADS anxiety score after 1 year of -0.9 (95% CI -1.8 to -0.1) points, p=0.038 and an increase in the 6MWT at 1 year, of 65 (95% CI 35 to 99) m compared with baseline psinging group for adults with COPD who have completed PR and are enrolled in a weekly community exercise group and provide evidence of improved exercise capacity and a reduction in anxiety. ACTRN12615000736549; Results. Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a

  19. Comparative study of personality disorder associated with deliberate self harm in two different age groups (15-24 years and 45-74 years).

    Science.gov (United States)

    Nath, Saswati; Patra, Dipak Kumar; Biswas, Srilekha; Mallick, Asim Kumar; Bandyopadhyay, Gautam Kumar; Ghosh, Srijit

    2008-07-01

    To study the presence of personality disorder in cases of deliberate self harm (DSH) in young (15-24 years) and elderly (45-74 years) and compare. Deliberate self harm cases admitted in Medical and surgical departments and cases attending psychiatry department of R.G. Kar Medical College, Kolkata were studied. For diagnosis of personality disorder ICD 10 International Personality Disorder Examination (IPDE) questionnaire was used. Percentage of elderly patients having personality disorder (64%) was higher compared to young DSH patients (58.5%). In young group, most common disorder was emotionally unstable personality disorder (28.6%) and in elderly group most common was anankastic type of personality disorder (36%). Schizoid, dissocial, histrionic, and anxious-avoidant personality disorders were found in small percentages of cases. Among DSH patients, the most common personality disorder found in young age was Emotionally unstable (Impulsive and Borderline) personality disorder, but most common personality disorder found in elderly patients was Anankastic personality disorder.

  20. Adolescent Suicide Rates Between 1990 and 2009: Analysis of Age Group 15-19 Years Worldwide.

    Science.gov (United States)

    Kõlves, Kairi; De Leo, Diego

    2016-01-01

    The aim of the current analysis is to analyze suicide rates in adolescents aged 15-19 years in decades between 1990 and 2009 worldwide. Suicide data were obtained from the World Health Organization Mortality Database and population data from the World Bank Data set. In total, 81 countries or territories, having data at least for 5 years in 1990-1999 and in 2000-2009, were included in the analysis. Additional analysis for regional trends with 57 countries was performed. Over the decades considered, analysis showed a declining trend in the overall suicide rate for males from 10.30 to 9.51 per 100,000 (p = .076), and for females from 4.39 to 4.18 (p = .472). The average suicide rate showed a significant decline for both genders in Europe, dropping from 13.13 to 10.93 (p = .001) in males and from 3.88 to 3.34 in females (p = .038). There was a significant increase in South American countries for males, from 7.36 to 11.47 (p = .016), and a close to significant rise for females, from 5.59 to 7.98 (p = .053). Although other world regions did not show significant trends, there were several significant changes at country level. Reasons behind the decrease in Western countries could potentially be related to the overall improvements in global health; the possible contribution of suicide prevention activities remains unclear. Increases in several South American countries might be related to economic recession and its impact on adolescents from diverse cultural backgrounds, and partly also to improvements in mortality registration. Copyright © 2016 Society for Adolescent Health and Medicine. Published by Elsevier Inc. All rights reserved.

  1. The AAS Working Group on Accessibility and Disability (WGAD) Year 1 Highlights and Database Access

    Science.gov (United States)

    Knierman, Karen A.; Diaz Merced, Wanda; Aarnio, Alicia; Garcia, Beatriz; Monkiewicz, Jacqueline A.; Murphy, Nicholas Arnold

    2017-06-01

    The AAS Working Group on Accessibility and Disability (WGAD) was formed in January of 2016 with the express purpose of seeking equity of opportunity and building inclusive practices for disabled astronomers at all educational and career stages. In this presentation, we will provide a summary of current activities, focusing on developing best practices for accessibility with respect to astronomical databases, publications, and meetings. Due to the reliance of space sciences on databases, it is important to have user centered design systems for data retrieval. The cognitive overload that may be experienced by users of current databases may be mitigated by use of multi-modal interfaces such as xSonify. Such interfaces would be in parallel or outside the original database and would not require additional software efforts from the original database. WGAD is partnering with the IAU Commission C1 WG Astronomy for Equity and Inclusion to develop such accessibility tools for databases and methods for user testing. To collect data on astronomical conference and meeting accessibility considerations, WGAD solicited feedback from January AAS attendees via a web form. These data, together with upcoming input from the community and analysis of accessibility documents of similar conferences, will be used to create a meeting accessibility document. Additionally, we will update the progress of journal access guidelines and our social media presence via Twitter. We recommend that astronomical journals form committees to evaluate the accessibility of their publications by performing user-centered usability studies.

  2. Proficiency Assessment of Male Volleyball Teams of the 13-15-Year Age Group at Estonian Championships

    Science.gov (United States)

    Stamm, Meelis; Stamm, Raini; Koskel, Sade

    2008-01-01

    Study aim: Assessment of feasibility of using own computer software "Game" at competitions. Material and methods: The data were collected during Estonian championships in 2006 for male volleyball teams of the 13-15-years age group (n = 8). In all games, the performance of both teams was recorded in parallel with two computers. A total of…

  3. Preserving third year medical students' empathy and enhancing self-reflection using small group "virtual hangout" technology.

    Science.gov (United States)

    Duke, Pamela; Grosseman, Suely; Novack, Dennis H; Rosenzweig, Steven

    2015-01-01

    Medical student professionalism education is challenging in scope, purpose, and delivery, particularly in the clinical years when students in large universities are dispersed across multiple clinical sites. We initiated a faculty-facilitated, peer small group course for our third year students, creating virtual classrooms using social networking and online learning management system technologies. The course emphasized narrative self-reflection, group inquiry, and peer support. We conducted this study to analyze the effects of a professionalism course on third year medical students' empathy and self-reflection (two elements of professionalism) and their perceptions about the course. Students completed the Groningen Reflection Ability Scale (GRAS) and the Jefferson Scale of Empathy (JSE) before and after the course and provided anonymous online feedback. The results of the JSE before and after the course demonstrated preservation of empathy rather than its decline. In addition, there was a statistically significant increase in GRAS scores (p < 0.001), suggesting that the sharing of personal narratives may foster reflective ability and reflective practice among third year students. This study supports previous findings showing that students benefit from peer groups and discussion in a safe environment, which may include the use of a virtual group video platform.

  4. Suicide by age, ethnic group, coroners' verdicts and country of birth - A three-year survey in inner London

    NARCIS (Netherlands)

    Neeleman, J; Mak, [No Value; Wessely, S

    Background information on suicide in ethnic and immigrant groups in England and Wales is limited. Method A three-year (1991-1993) survey was conducted of all unnatural deaths of residents of an urban area. True likely and 'official' age-adjusted suicide rates were compared by ethnicity and, for

  5. Collaborative-Group Testing Improves Learning and Knowledge Retention of Human Physiology Topics in Second-Year Medical Students

    Science.gov (United States)

    Vázquez-García, Mario

    2018-01-01

    The present study examined the relationship between second-year medical students' group performance and individual performance in a collaborative-learning environment. In recent decades, university professors in the scientific and humanistic disciplines have successfully put into practice different modalities of collaborative approaches to…

  6. Effectiveness of a School-Based Early Intervention CBT Group Programme for Children with Anxiety Aged 5-7 Years

    Science.gov (United States)

    Ruocco, Sylvia; Gordon, Jocelynne; McLean, Louise A.

    2016-01-01

    Early manifestations of anxiety in childhood confer significant distress and life interference. This study reports on the first controlled trial of the "Get Lost Mr. Scary" programme, a Cognitive Behavioural Therapy group intervention for children with anxiety aged 5-7 years. Participants were 134 children (65 males and 69 females) drawn…

  7. Making the Good Even Better: Feedback from easyCBM Focus Groups, School Year 2009/2010. Technical Report # 1001

    Science.gov (United States)

    Alonzo, Julie; Tindal, Gerald; Lai, Cheng-Fei

    2010-01-01

    This technical report provides a summary of feedback from teachers, administrators, and support personnel who used the easyCBM progress monitoring and benchmark assessment system during school year 2009/2010. Data were gathered from semi-structured focus groups conducted during the 2010 easyCBM August Institute at the University of Oregon. Results…

  8. Differences on Six Horn Abilities for 14 Age Groups between 15-16 and 75-94 Years.

    Science.gov (United States)

    Kaufman, Alan S.; And Others

    1996-01-01

    Six abilities derived from the fluid and crystallized intelligence theory of J. L. Horn were studied with 1,193 individuals in age groups between 15 and 94 years. Results supported Horn's classification of crystallized and quantitative as maintained abilities and of fluid and broad visualization as vulnerable abilities. (SLD)

  9. Efficacy and safety of tamsulosin 0.4 mg single pills for treatment of Asian patients with symptomatic benign prostatic hyperplasia with lower urinary tract symptoms: a randomized, double-blind, phase 3 trial.

    Science.gov (United States)

    Chung, Jae Hoon; Oh, Cheol Young; Kim, Jae Heon; Ha, U-Syn; Kim, Tae Hyo; Lee, Seung Hwan; Han, Jun Hyun; Bae, Jae Hyun; Chang, In Ho; Han, Deok Hyun; Yoo, Tag Keun; Chung, Jae Il; Kim, Sae Woong; Jung, Jina; Kim, Yong-Il; Lee, Seung Wook

    2018-04-12

    To verify the efficacy and safety of tamsulosin 0.4 mg and tamsulosin 0.2 mg compared with those of placebo in patients with lower urinary tract symptoms (LUTS) associated with benign prostatic hyperplasia (BPH). A total of 494 patients from multiple centers participated in this double-blind, randomized, phase 3 trial. Eligible patients were randomly assigned to the tamsulosin 0.4 mg group, tamsulosin 0.2 mg group or placebo group. The International Prostate Symptom Score (IPSS), maximum flow rate (Qmax), post-void residual (PVR) urine volume, blood pressure, heart rate and adverse events were compared among the three groups at 4, 8 and 12 weeks. A total of 494 BPH patients were analyzed. There were no differences in the baseline characteristics among the three groups. After 12 weeks of treatment, total IPSS was improved in the 0.2 mg and 0.4 mg tamsulosin groups; however, the extent of improvement was greater in the 0.4 mg group than in the 0.2 mg group (0.4 mg: -9.59 vs. 0.2 mg: -5.61; least-squares mean difference [95% confidence interval]: -3.95 [-5.01, -2.89], p Tamsulosin 0.4 mg and 0.2 mg appear to be superior to placebo treatment, and tamsulosin 0.4 mg is more effective than 0.2 mg in terms of total IPSS improvement. Tamsulosin 0.4 mg has favorable efficacy and tolerability in Asian men with symptomatic BPH. ClinicalTrials.gov Identifier: NCT02390882.

  10. Sing Your Lungs Out—a community singing group for chronic obstructive pulmonary disease: a 1-year pilot study

    Science.gov (United States)

    McNaughton, Amanda; Weatherall, Mark; Williams, Mathew; McNaughton, Harry; Aldington, Sarah; Williams, Gayle; Beasley, Richard

    2017-01-01

    Objective Singing group participation may benefit patients with chronic obstructive pulmonary disease (COPD). Previous studies are limited by small numbers of participants and short duration of generally hospital-based singing group intervention. This study examines the feasibility of long-term participation in a community singing group for patients with COPD who had completed pulmonary rehabilitation (PR). Methods This was a feasibility cohort study. Patients with COPD who had completed PR and were enrolled in a weekly community exercise group were recruited to a new community-based singing group which met weekly for over 1 year. Measurements at baseline, 4 months and 1 year comprised comprehensive pulmonary function tests including lung volumes, 6 min walk test (6MWT), Clinical COPD Questionnaire (CCQ), Hospital Anxiety and Depression Scale (HADS) and hospital admission days for acute exacerbation of COPD (AECOPD) for 1 year before and after the first singing group session. Findings There were 28 participants with chronic lung disease recruited from 140 people approached. Five withdrew in the first month. 21 participants meeting Global Initiative for Chronic Obstructive Lung Disease criteria for COPD completed 4-month and 18 completed 1-year assessments. The mean attendance was 85%. For the prespecified primary outcome measure, total HADS score, difference between baseline and 12 months was −0.9, 95% CI −3.0 to 1.2, p=0.37. Of the secondary measures, a significant reduction was observed for HADS anxiety score after 1 year of −0.9 (95% CI −1.8 to −0.1) points, p=0.038 and an increase in the 6MWT at 1 year, of 65 (95% CI 35 to 99) m compared with baseline psinging group for adults with COPD who have completed PR and are enrolled in a weekly community exercise group and provide evidence of improved exercise capacity and a reduction in anxiety. Trial registration number ACTRN12615000736549; Results. PMID:28119393

  11. A 1-year videoconferencing-based psychoeducational group intervention following bariatric surgery: results of a randomized controlled study.

    Science.gov (United States)

    Wild, Beate; Hünnemeyer, Katharina; Sauer, Helene; Hain, Bernhard; Mack, Isabelle; Schellberg, Dieter; Müller-Stich, Beat Peter; Weiner, Rudolf; Meile, Tobias; Rudofsky, Gottfried; Königsrainer, Alfred; Zipfel, Stephan; Herzog, Wolfgang; Teufel, Martin

    2015-01-01

    For severely obese patients, bariatric surgery has been recommended as an effective therapy. The Bariataric Surgery and Education (BaSE) study aimed to assess the efficacy of a videoconferencing-based psychoeducational group intervention in patients after bariatric surgery. The BaSE study is a randomized, controlled multicenter clinical trial involving 117 patients undergoing bariatric surgery (mean preoperative body mass index [BMI] 49.9 kg/m(2), SD 6.4). Patients were enrolled between May 2009 and November 2012 and were randomly assigned to receive either conventional postsurgical visits or, in addition, a videoconferencing-based 1-year group program. Primary outcome measures were weight in kilograms, health-related quality of life (HRQOL), and general self-efficacy (GSE). Secondary outcome measures were depression symptoms and eating behavior. 94% of the patients completed the study. Mean weight loss for all patients was 45.9 kg (SD 16.4) 1 year after surgery (mean excess weight loss [EWL] 63%). Intention-to-treat analyses revealed no differences in weight loss, EWL, HRQOL, or self-efficacy between study groups at 1 year after surgery. However, patients with clinically significant depression symptoms (CSD) at baseline assigned to the intervention group (n = 29) had a significantly better HRQOL (P = .03), lower depression scores (P = .02), and a trend for a better EWL (.06) 1 year after surgery compared with the control group (n = 20). We could not prove the efficacy of the group program for the whole study sample. However, results indicate that the intervention is effective for the important subgroup of patients with CSD. Copyright © 2015 American Society for Bariatric Surgery. Published by Elsevier Inc. All rights reserved.

  12. First year nursing students' experiences of social media during the transition to university: a focus group study.

    Science.gov (United States)

    Ferguson, Caleb; DiGiacomo, Michelle; Saliba, Bernard; Green, Janet; Moorley, Calvin; Wyllie, Aileen; Jackson, Debra

    2016-10-01

    Social media platforms are useful for creating communities, which can then be utilised as a mean for supportive, professional and social learning. To explore first year nursing student experiences with social media in supporting student transition and engagement into higher education. Qualitative focus groups. Ten 1st year Bachelor of Nursing students were included in three face-to-face focus groups. Data were analysed using qualitative thematic content analysis. Three key themes emerged that illustrates the experiences of transition and engagement of first year student nurses using social media at university. (1) Facilitating familiarity and collaboration at a safe distance, (2) promoting independent learning by facilitating access to resources, and (3) mitigating hazards of social media. This study has demonstrated the importance of social media in supporting informal peer-peer learning and support, augmenting online and offline relationships, and building professional identity as a nurse.

  13. Stage-related behavioural problems in the 1-4 year old child: parental expectations in a child development unit referral group compared with a control group.

    Science.gov (United States)

    Ticehurst, R L; Henry, R L

    1989-02-01

    Behavioural problems in preschool (1-4 years) children are a common cause of referral to health services. Parents of children presenting to the child development unit with behavioural problems (n = 18) were compared with a control group (n = 45). A questionnaire was utilized to examine the parents' expectations of the children's behaviours. As might be expected, the parents of children presenting to the Unit rated their children as having more difficult behaviours. These parents had unrealistic expectations, particularly for the 'negative' behaviours (disobedience, temper tantrums, defiance and whinging). However, they were able to anticipate normal age-related difficulties in some problem areas (dawdling during mealtimes, masturbating, not sharing toys and being jealous of one's siblings). Counselling should address the issue of matching the expectations of parents with the individual rates of development of their children.

  14. Degree of corneal anaesthesia after topical application of 0.4% oxybuprocaine hydrochloride and 0.5% proparacaine hydrochloride ophthalmic solution in clinically normal cattle.

    Science.gov (United States)

    Little, W B; Jean, G St; Sithole, F; Little, E; Jean, K Yvorchuk-St

    2016-06-01

    The use of corneal anaesthesia is necessary for a range of clinical purposes. Therefore, we assessed and compared the efficacy of corneal anaesthesia after application of 0.4% oxybuprocaine hydrochloride and 0.5% proparacaine hydrochloride ophthalmic solution in clinically normal cattle. The 24 clinically normal cows were allocated into two groups. Cows in group 1 (n = 12) received 0.2 mL of 0.4% oxybuprocaine hydrochloride with fluorescein ophthalmic solution in one eye and 0.2 mL of sterile saline (0.9% NaCl) with fluorescein in the contralateral eye (control). Group 2 (n = 12) received 0.2 mL of 0.4% oxybuprocaine hydrochloride with fluorescein ophthalmic solution in one eye and 0.2 mL of 0.5% proparacaine hydrochloride with fluorescein in the contralateral eye (control). In each group, corneal touch threshold was determined by Cochet-Bonnet aesthesiometer for both eyes immediately prior to topical administration of solutions, at 1 min and 5 min after administration of topical solutions and every 5 min thereafter for a total of 75 min. Significant corneal anaesthesia was noted immediately following topical application of both oxybuprocaine and proparacaine as compared with controls, with maximal corneal anaesthesia noted 1 min after administration. Both oxybuprocaine and proparacaine produced significant corneal anaesthesia for the duration of the 75-min study. Neither oxybuprocaine hydrochloride nor proparacaine hydrochloride treatment resulted in visible adverse effects. There are limited data available demonstrating the efficacy and duration of corneal anaesthetic agents in cattle. Both oxybuprocaine hydrochloride and proparacaine hydrochloride should be considered practical options for providing corneal anaesthesia in cattle in a clinical setting. © 2016 Australian Veterinary Association.

  15. A Cross Sectional Study of Behavior Disorders In 6-15 Years Age Group in Rural Area

    OpenAIRE

    Kirti C Rasote, Alka D Gore, Usha Ranganathan

    2015-01-01

    "Background: Child & adolescent psychiatric disorders and behavioral disorders are not given adequate attention. Such studies are either school based or hospital based. Methods: To study the prevalence and pattern of behavior disorders among children from the community a cross sectional study was conducted in rural area with 600 children of 6-15 years age group by the ‘Purposive Sampling’ method. Percentages & chi square test was used. Results: Response rate was 94%. Out o...

  16. Optical, ferroelectric and magnetic properties of multiferroelectric BiFeO3-(K0.5Na0.5)0.4(Sr 0.6Ba0.4)0.8Nb2O6 thin films

    KAUST Repository

    Yao, Yingbang

    2014-02-01

    Multiferroic BiFeO3-(K0.5Na0.5) 0.4(Sr0.6Ba0.4)0.8Nb 2O6 (BFO-KNSBN) trilayer thin films, were epitaxially grown on MgO(0 0 1) and SrTiO3(0 0 1) by using pulsed laser deposition (PLD). Their ferroelectric, magnetic, dielectric and optical properties were investigated. It was found that both ferroelectric polarization and dielectric constant of the films were enhanced by introducing KNSBN as a barrier layer. Meanwhile, ferromagnetism of BFO was maintained. More interestingly, a double hysteresis magnetic loop was observed in the KNSBN-BFO-KNSBN trilayer films, where exchange bias and secondary phase in the BFO layer played crucial roles. Interactions between adjacent layers were revealed by temperature-dependent Raman spectroscopic measurements. © 2013 Elsevier B.V. All rights reserved.

  17. Executive functions and sustained attention:Comparison between age groups of 19-39 and 40-59 years old

    Directory of Open Access Journals (Sweden)

    Camila Rosa de Oliveira

    Full Text Available ABSTRACT Few studies involving the cognition of middle-aged adults are available in the international literature, particularly investigating the process of cognitive aging, executive components and attention. Objectives: The aim of this study was to investigate whether there are differences in performance on neuropsychological tasks of executive functions and sustained attention between two age groups. Methods: The sample consisted of 87 adults aged from 19 to 59 years old, divided into two groups according to the age variable (younger adults and middle-aged adults. All participants were Brazilian and had no sensory, psychiatric or neurological disorders; subjects also had no history of alcohol abuse, and no self-reported use of illicit drugs or antipsychotics. The neuropsychological instruments administered were the Hayling Test, Trail Making Test, Bells Test and verbal fluency tasks. Results: Groups showed no significant differences in relation to sociodemographic variables, educational level or frequency of reading and writing habits. The younger adult group performed better than the middle-aged group on tasks that involved mainly processing speed, cognitive flexibility and lexical search. Conclusions: These findings serve as a valuable reference for cognitive processing in middle-aged adults, since a large number of comparative studies focus only on the younger and later phases of adulthood. Additional studies are needed to investigate possible interaction between different factors such as age and education.

  18. Effect of Group Setting on Gross Motor Performance in Children 3-5 Years Old with Motor Delays.

    Science.gov (United States)

    Fay, Deanne; Wilkinson, Tawna; Wagoner, Michelle; Brooks, Danna; Quinn, Lauren; Turnell, Andrea

    2017-02-01

    The purpose of this study was to evaluate differences in gross motor performance of children 3-5 years of age with motor delays when assessed individually compared to assessment in a group setting among peers with typical development (TD). Twenty children with motor delays and 42 children with TD were recruited from a preschool program. A within-subject repeated measures design was used; each child with delay was tested both in an individual setting and in a group setting with two to four peers with TD. Testing sessions were completed 4-8 days apart. Ten different motor skills from the Peabody Developmental Motor Scales-2 were administered. Performance of each item was videotaped and scored by a blinded researcher. Overall gross motor performance was significantly different (p < .05) between the two settings, with 14 of 20 children demonstrating better performance in the group setting. In particular, children performed better on locomotion items (p < .05). The higher scores for locomotion in the group setting may be due to the influence of competition, motivation, or modeling. Assessing a child in a group setting is recommended as part of the evaluation process.

  19. Study of palmar dermatoglyphics in patients with essential hypertension between the age group of 20-50 years

    Directory of Open Access Journals (Sweden)

    Rudragouda S Bulagouda, Purnima J Patil, Gavishiddppa A Hadimani, Balappa M Bannur, Patil BG, Nagaraj S. Mallashetty, Ishwar B Bagoji

    2013-10-01

    Full Text Available Background: In present study, we tried to determine significant palmar dermatoglyphic parameters in case of essential hypertensive’s in age group between 20-50 years and whether the parameters can be used for screening purpose i.e., early detection of hypertension. Method: With the use of modified Purvis Smith method, Black duplicating ink (Kores, Bombay was smeared on both hands one by one and prints will be taken by rolling the hands from wrist creases to finger tips on the roller covered with bond paper. While crystal bond paper, applied firmly over a wooden pad, was used for recording the inked epidermal ridge patterns. Rolled finger prints were recorded after applying uniform pressure on white bond paper from ulnar to radial side. Complete palm impression, including the hollow or the palm was obtained over paper. Thus one set of finger prints and palm prints was obtained. The prints obtained were immediately examined with hand-lens. Result: Right hand and left hand of the both male and female study group showed more number of arches than controls. Right hand and left hand of the both male and female study group showed more number of Radial loops than controls. The right hand and left hand of both male and female control group showed more number of ulnar loops than study group. The right hand and left hand of the male control group showed more number of Whorls than study, while in females, the right hand study group showed more number of whorls than control group and the left hand study group showed less number of Whorls as compared to control group. Conclusion: The present study indicates that there are some genetic factors which are involved in the causation of essential hypertension and it is possible to certain extent to predict from dermatoglyphics individual’s chance of acquiring essential hypertension. Like clinical history, examination and investigations, the dermatoglyphics will play an important role revealing the genetic

  20. Fermi surface instability at 0.4K in a heavy-fermion YbBiPt: SDW?

    International Nuclear Information System (INIS)

    Movshovich, R.; Lacerda, A.; Canfield, P.C.; Thompson, J.D.; Fisk, Z.

    1994-01-01

    The authors report results of resistivity measurements of heavy-fermion compound YbBiPt at ambient and hydrostatic pressures of up to ∼ 6kbars and in magnetic field up to 1 Tesla. They interpret the rise of resistivity below 0.4K as partial gaping of the Fermi surface. From the temperature dependence of resistivity they obtain the value of the weak coupling energy gap of Δ 0 /k B T c = 1.65 ± 0.15. Magnetic field -- transition temperature phase diagram follows the weak coupling BCS expression remarkably well from T c to T c /4. These results support identification of 0.4K transition as a Spin Density Wave formation

  1. Surface Nb-ALLOYING on 0.4C-13Cr Stainless Steel: Microstructure and Tribological Behavior

    Science.gov (United States)

    Yu, Shengwang; You, Kai; Liu, Xiaozhen; Zhang, Yihui; Wang, Zhenxia; Liu, Xiaoping

    2016-02-01

    0.4C-13Cr stainless steel was alloyed with niobium using double glow plasma surface alloying and tribological properties of Nb-alloyed steel such as hardness, friction and wear were measured. Effects of the alloying temperature on microstructure and the tribological behavior of the alloyed steel were investigated compared with untreated steel. Formation mechanisms of Nb-alloyed layers and increased wear resistance were also studied. The result shows that after surface Nb-alloying treatment, the 0.4C-13Cr steel exhibits a diffusion adhesion at the alloyed layer/substrate interface and improved tribological property. The friction coefficient of Nb-alloyed steel is decreased by about 0.3-0.45 and the wear rate after Nb-alloying is only 2-5% of untreated steel.

  2. Oxygen transport in La0.6Sr0.4Co1-yFeyO3-d

    NARCIS (Netherlands)

    Bouwmeester, Henricus J.M.; den Otter, M.W.; Boukamp, Bernard A.

    2004-01-01

    The surface exchange coefficient and chemical diffusion coefficient of oxygen for the perovskites La0.6Sr0.4Co1–yFeyO3–delta (y=0.2, 0.5 and 0.8) were measured using the conductivity relaxation technique. Measurements were performed between 600 and 800 °C in an oxygen partial pressure range between

  3. Electronic transport and magnetoresistivity of La0.4Bi0.1Ca0.5 ...

    Indian Academy of Sciences (India)

    Administrator

    for their intriguing electric and magnetic properties.1 One of the interesting ... ground state is sensitive to the average size 〈rA〉 of A-site cation (La3+ .... (~ 300 nm in diameter) are nearly spherical in shape and uniform in ... Figure 3. Temperature-dependent resistivity of La0.4Bi0.1. Ca0.5–xSrxMnO3 (x = 0.1 and 0.2). transition ...

  4. 0.4-1.2 GHz hybrid Al-CFRP open-boundary quad-ridge horn

    DEFF Research Database (Denmark)

    Kim, Oleksiy S.; Pivnenko, Sergey; Breinbjerg, Olav

    2011-01-01

    We present a 0.4-1.2 GHz open-boundary quad-ridge horn to be used as a wide-band probe at the DTU-ESA Spherical Near-Field Antenna Test Facility at the Technical University of Denmark (DTU). Due to adopted hybrid Al-CFRP fabrication technology, the weight of the probe is reduced by a factor of 2...

  5. Design and operating experience of the first commercial 0.4-5.0 MW fluidized bed boilers in Belarus

    Energy Technology Data Exchange (ETDEWEB)

    Borodulya, V.A.; Dobkin, S.M.; Telegin, E.M. [Academy of Sciences of Belarus, Minsk (Belarus). A.V. Luikov Heat and Mass Transfer Institute

    1995-12-31

    The present paper describes the development of AFBC systems for industrial and district heating in the range of capacities less than 5 MWth. The main goal is a plant which can be operated automatically and which meets the severe emission standards burning various kinds of coals including combustible wastes. First operating results of a 0.4 MWth plant are presented and demonstrate the basic feasibility of the concept. 6 refs., 1 fig., 4 tabs.

  6. Epitaxial growth of matched metallic ErP0.6As0.4 layers on GaAs

    International Nuclear Information System (INIS)

    Guivarc'h, A.; Le Corre, A.; Gaulet, J.; Guenais, B.; Minier, M.; Ropars, G.; Badoz, P.A.; Duboz, J.Y.

    1990-01-01

    Successful growth of (001)ErP 0.6 As 0.4 single crystal film on (001) GaAs has been demonstrated. The epitaxial metallic layers reproducibly showed lattice mismatch below 5 10 -4 . This is, to the authors' knowledge, the first report of a stable, epitaxial and lattice-matched metal/compound semiconductor heterostructure. The ErP 0.6 As 0.4 /n-GaAs diodes yielded excellent I-V characteristics with an ideality factor of 1.1 and barrier height of 0.88 eV. For a 240 Angstrom- thick film, metallic behavior was observed with resistivities of 25 and 86 μΩcm at 1.5 K and room temperature, respectively. As the other Er compounds ErP, ErAs, ErSb and ErSi 2 , ErP 0.6 As 0.4 presents an abrupt drop in resistivity in the vicinity of the liquid helium temperature, due to a paramagnetic to antiferromagnetic phase transition

  7. Effects of annealing, acid and alcoholic beverages on Fe1+yTe0.6Se0.4

    International Nuclear Information System (INIS)

    Sun, Y; Taen, T; Tsuchiya, Y; Tamegai, T; Shi, Z X

    2013-01-01

    We have systematically investigated and compared different methods to induce superconductivity in the iron chalcogenide Fe 1+y Te 0.6 Se 0.4 , including annealing in a vacuum, N 2 , O 2 and I 2 atmospheres and immersing samples into acid and alcoholic beverages. Vacuum and N 2 annealing are proved to be ineffective in inducing superconductivity in a Fe 1+y Te 0.6 Se 0.4 single crystal. Annealing in O 2 and I 2 and immersion in acid and alcoholic beverages can induce superconductivity by oxidizing the excess Fe in the sample. Superconductivity in O 2 annealed samples is of a bulk nature, while I 2 , acid and alcoholic beverages can only induce superconductivity near the surface. By comparing the different effects of O 2 , I 2 , acid and alcoholic beverages we propose a scenario to explain how the superconductivity is induced in the non-superconducting as-grown Fe 1+y Te 0.6 Se 0.4 . (paper)

  8. Magnetic phase transition in MnFeP0.5As0.4Si0.1

    International Nuclear Information System (INIS)

    Wang, J L; Campbell, S J; Tegus, O; Brueck, E; Dou, S X

    2010-01-01

    We have carried out a detailed investigation of the magnetic phase transition in MnFeP 0.5 As 0.4 Si 0.1 . Temperature hysteresis has been observed in the variable temperature magnetization curves (B appl = 0.01 T) with T C W ∼ 302 K on warming and T C C ∼ 292 K on cooling. The first order nature of this transition in MnFeP 0.5 As 0.4 Si 0.1 is confirmed by the negative slope obtained from isotherms of M 2 versus B/M around the critical temperature. Linear thermal expansion measurements reveal a large volume change, ΔV/V∼8.7x10 -3 at the magnetic phase transition and that this magnetovolume effect is suppressed to ΔV/V ∼ 5.5x10 -3 in an applied field of B appl = 1.0 T. Analyses of 57 Fe Moessbauer spectra (4.5 - 300 K) using a random distribution model and taking nearest-neighbour environments into account, indicate that the paramagnetic and ferromagnetic phases coexist over a temperature range of ∼ 45 K around the Curie temperature. The Debye temperature for MnFeP 0.5 As 0.4 Si 0.1 has been evaluated as θ D = 350 ± 20 K from the temperature dependence of the average isomer shift.

  9. Effect of 0.4 mT power frequency magnetic field on F-actin assembly of CHL cells

    International Nuclear Information System (INIS)

    Chu Keping; Cai Zhiyin; Zhang Yukun; Xia Nuohong

    2007-01-01

    Objective: To investigate the effect of 0.4mT power frequency magnetic field on the microfilament (F- actin) assembly of Chinese hamster lung (CHL) cells. Methods: F-actin were marked with immunohistochemical method, then observed under a confocal microscope. The content of ECFRs in the preparation of the detergent-insoluble cytoskeleton was measured with Western-blotting. Results: The stress fiber's of CHL cells decreased after exposure to 0.4mT power frequency magnetic field for 30min, as well as after treatment with epidermal growth factor (ECF) of 50nM. Filopodias appeared at the periphery after exposure to magnetic field as well as treatment with EGF. The EGF receptor mass associated with the detergent-insoluble cytoskeleton increased after exposure to magnetic field as well as treatment with EGF. Conclusion: 0.4mT power frequency magnetic field induced assembly of F-actin in CHL cells. The change induced by magnetic field would be related to clustering of EGFR induced by magnetic field and passing the signal down. (authors)

  10. Studying sulfur functional groups in Norway spruce year rings using S L-edge total electron yield spectroscopy

    International Nuclear Information System (INIS)

    Struis, Rudolf P.W.J.; Ludwig, Christian; Barrelet, Timothee; Kraehenbuehl, Urs; Rennenberg, Heinz

    2008-01-01

    Profiles of the major sulfur functional groups in mature Norway spruce wood tissue have been established for the first time. The big challenge was the development of a method suitable for sulfur speciation in samples with very low sulfur content (< 100 ppm). This became possible by synchrotron X-ray absorption spectroscopy at the sulfur L-edge in total electron yield (TEY) detection mode with thin gold-coated wood slices. Functional groups were identified using sulfur compound spectra as fingerprints. Latewood of single year rings revealed metabolic plausible sulfur forms, particularly inorganic sulfide, organic disulfide, methylthiol, and highly oxidized sulfur. Form-specific profiles with Norway spruces from three different Swiss forest sites revealed high, but hitherto little-noticed, sulfur intensities attributable to natural heartwood formation and a common, but physiologically unexpected maximum around year ring 1986 with trees from the industrialized Swiss Plateau. It is hypothesized whether it may have resulted from the huge reduction in sulfur emissions after 1980 due to Swiss policy. Comparison with total S content profiles from optical emission spectroscopy underlined the more accurate and temporally better resolved TEY data with single wood year rings and it opened novel insights into the wood cell chemistry

  11. Oral health status of two 12-year-old socially disadvantaged groups in South India: a comparative study.

    Science.gov (United States)

    Singh, Abhinav; Sequiera, Peter; Acharya, Shashidhar; Bhat, Maghashyam

    2011-01-01

    The aim of the present study was to compare and assess the oral health status of 12-year-old children from two socially disadvantaged groups in the Udupi district of South India. A total of 327 children were examined in Ashrama schools, and 340 children were randomly selected for comparison from other government schools. Modified WHO proforma was used for clinical examination. Oral hygiene practices, dental fluorosis, periodontal status, dentition status and dentofacial anomalies were assessed and compared. Chi square test was used for comparison between categorical variables and Mann-Whitney test for comparison between two groups for quantitative variables. P u 0.05 was considered as statistically significant. Dental fluorosis was detected in 22.9% children from Ashrama schools, whereas in the comparison group 14.4% children had dental fluorosis (P u 0.001). Mean Decayed teeth and DMFT value in Ashrama school children were 1.15 ± 1.62, and 1.15 ± 1.62, respectively. In the comparison group, the corresponding values were 0.46 ± 0.98 and 0.48 ± 1.04, respectively (P u 0.001). The mean number of sextants in the Ashrama school children with Community Periodontal Index score 2 was 2.00 ± 1.53, whereas in the comparison group it was 1.31 ± 1.53 (P u 0.001). No significant differences were noted between two groups with respect to Dental Aesthetic Index scores. The present study revealed higher levels of dental caries experience, untreated dental disease and social disadvantage of the children attending Ashrama schools, providing evidence for the need to address the health inequalities of these children.

  12. Do fourth year pharmacy students use Facebook to form workplace-based learning peer groups during rotations?

    Science.gov (United States)

    Phillips, Jennifer; Gettig, Jacob; Goliak, Kristen; Allen, Sheila; Fjortoft, Nancy

    2017-11-01

    The objective of this study was to gain an understanding of whether pharmacy students are using Facebook ® to create formal or informal workplace-based peer groups to learn from each other and share information while completing their advanced pharmacy practice experiences (APPEs). Fourth-year pharmacy students from two colleges of pharmacy in the same geographical area were recruited by email to participate. Inclusion criteria were: completion of two or more APPEs, current assignment to an APPE rotation in the local area, and a Facebook ® profile. Two focus groups, of eight students each were conducted on each of the two colleges' campuses. An incentive to participate was provided. Thematic analysis was used to analyze responses. Students reported using Facebook ® to learn about rotation expectations, roles/responsibilities, and preceptors. However, frequency and depth of interactions varied among the participants. Most participants noted that they prefer more private methods of communication to learn about APPE experiences. Students found Facebook ® to be a good source of motivation and support during experiential learning. The use of social media sites like Facebook ® may help students form "virtual" workplace-based peer groups during APPEs. Pharmacy schools interested in providing support for formal workplace-based learning groups should consider using social media sites as one component of this program. Copyright © 2017 Elsevier Inc. All rights reserved.

  13. Reflections on two years after establishing an orthogeriatric unit: a focus group study of healthcare professionals' expectations and experiences.

    Science.gov (United States)

    Abrahamsen, C; Nørgaard, B; Draborg, E; Nielsen, D

    2017-08-25

    For decades hospitals have been "vertically" organized, with the risk that specialization leads to fragmented and one-sided views of patient care and treatment that may cause poor communication and coordination of care and treatment. Two years after the introduction of an orthogeriatric unit for elderly patients admitted with fragility fractures, we studied the involved healthcare professionals' perspectives and experiences with working in an interprofessional organization. We performed four focus groups interviews with 19 healthcare workers representing different professions. The interviews were analysed using systematic text condensation (STC). Three themes were identified: 1) A patient-centred approach, 2) An opportunity for professional growth and 3) The benefits of interprofessional collaboration. The interviewees emphasized in particular the systematic and frequent face-to-face communication enabled by the interprofessional team meetings as essential to their feeling of enhanced collegial solidarity. All groups expressed their respect for other groups' competences and their vital contributions to good orthogeriatric care. However, collaboration was challenged by the groups' divergent views of the patients and of the relevance of the information given in the weekly meetings. Heavy workloads were also mentioned. The opportunity for professional growth was also felt to be imperilled by some professionals. All participants indicated their view that the orthogeriatric organization had improved the quality of care and treatment. Furthermore, good communication, mutual respect for other professional competences and shared goals were found to have enhanced interprofessional collaboration and improved the sense of having a shared mission. However, differences in approaches and expectations continued to challenge the orthogeriatric model after 2 years. Neither did all professionals find orthogeriatric care professionally challenging.

  14. Danish Breast Cancer Cooperative Group--DBCG: History, organization, and status of scientific achievements at 30-year anniversary

    DEFF Research Database (Denmark)

    Blichert-Toft, M.; Christiansen, Peter; Mouridsen, H.T.

    2008-01-01

    treatment programmes including in situ lesions and primary invasive breast cancer. Probands are subdivided into risk groups based on a given risk pattern and allocated to various treatment programmes accordingly. The scientific initiatives are conducted in the form of register- and cohort analysis...... on a risk scale. The main achievements resulted in a reduction of relative risk of death amounting up to 20% and increased 5-year overall survival ascending from 60% to roughly 80%. This article is partly based on a Danish paper to be published in the Centenary Jubilee book of the Danish Surgical Society...

  15. Study of palmar dermatoglyphics in patients with essential hypertension between the age group of 20-50 years

    OpenAIRE

    Rudragouda S Bulagouda, Purnima J Patil, Gavishiddppa A Hadimani, Balappa M Bannur, Patil BG, Nagaraj S. Mallashetty, Ishwar B Bagoji

    2013-01-01

    Background: In present study, we tried to determine significant palmar dermatoglyphic parameters in case of essential hypertensive’s in age group between 20-50 years and whether the parameters can be used for screening purpose i.e., early detection of hypertension. Method: With the use of modified Purvis Smith method, Black duplicating ink (Kores, Bombay) was smeared on both hands one by one and prints will be taken by rolling the hands from wrist creases to finger tips on the roller covered ...

  16. Use of the gamma radiation, in a dose of 0,4 kGy, on the storage temperature reduction of the banana nanica;Utilizacao da radiacao gama, na dose de 0,4kGy, na reducao da temperatura de armazenamento da banana nanica

    Energy Technology Data Exchange (ETDEWEB)

    Manoel, Luciana, E-mail: luciana_manoel@yahoo.com.b [Universidade Estadual Paulisa (UNESP), Botucatu, SP (Brazil). Fac. de Ciencias Agronomicas. Programa de Pos-graduacao em Energia na Agricultura; Vieites, Rogerio Lopes, E-mail: vieites@fca.unesp.b [Universidade Estadual Paulisa (UNESP), Botucatu, SP (Brazil). Fac. de Ciencias Agronomicas. Dept. de Gestao e Tecnologia Agroindustrial

    2009-07-01

    The aim was to evaluate the use of gamma radiation, in a dose of 0,4 kGy, on the storage temperature reduction of the banana 'Nanica'. The bananas 'Nanica' were harvested in the Arm Taperao, Brotas (SP) town, and sent to CBE (Companhia Brasileira de Esterilizacao-Cotia-SP) for irradiation and constitution of the following treatments: T1 (fruits irradiated at 0,4 kGy and stored at 16 +-1 deg C); T2 (fruits irradiated at 0,4 kGy and stored at 14 +-1 deg C); T3 (fruit irradiated ata 0,4 kGy and stored at 12+-1 deg C); T4 (fruits non-irradiated and stored at 16+-1 deg C); T5 (fruits non-irradiated and stored at 14+-1 deg C) and T6 (fruits non-irradiated and stored at 12+-1 deg C). The fruits were stored in B.O.Ds. of the Agroindustrial Management and Technology Department, with a relative humidity of 80+-5%. The experiment was divided in two groups: control group (post harvest conservation and disease incidence) and parcel group (soluble solids and pulp/peel). The analyses were performed in intervals of five days during a period of 25 days. The experimental design employed was completely randomized (DIC) by applying a factor of 2 x 3 x 6 (irradiation x temperature x time). The Tukey test with 5% of probability was used for comparison between means. The storage temperature of the bananas 'Nanica' was not reduce by irradiation. (author)

  17. Infiltrated La0.4Sr0.4Fe0.03Ni0.03Ti0.94O3 based anodes for all ceramic and metal supported solid oxide fuel cells

    Science.gov (United States)

    Nielsen, Jimmi; Persson, Åsa H.; Sudireddy, Bhaskar R.; Irvine, John T. S.; Thydén, Karl

    2017-12-01

    For improved robustness, durability and to avoid severe processing challenges alternatives to the Ni:YSZ composite electrode is highly desirable. The Ni:YSZ composite electrode is conventionally used for solid oxide fuel cell and solid oxide electrolysis cell. In the present study we report on high performing nanostructured Ni:CGO electrocatalyst coated A site deficient Lanthanum doped Strontium Titanate (La0.4Sr0.4Fe0.03Ni0.03Ti0.94O3) based anodes. The anodes were incorporated into the co-sintered DTU metal supported solid oxide fuel cell design and large sized 12 cm × 12 cm cells were fabricated. The titanate material showed good processing characteristics and surface wetting properties towards the Ni:CGO electrocatalyst coating. The cell performances were evaluated on single cell level (active area 16 cm2) and a power density at 0.7 V and 700 °C of 0.650 Wcm-2 with a fuel utilization of 31% was achieved. Taking the temperature into account the performances of the studied anodes are among the best reported for redox stable and corrosion resistant alternatives to the conventional Ni:YSZ composite solid oxide cell electrode.

  18. Antibiogram pattern of oral microflora in periodontic children of age group 6 to 12 years: a clinicomicrobiological study.

    Science.gov (United States)

    Fysal, N; Jose, Santhosh; Kulshrestha, Reena; Arora, Dimple; Hafiz, Ka Abdul; Vasudevan, Sanjay

    2013-07-01

    The study was carried out to see the diversity of oral microflora and its antibiotic sensitivity test in children of age group 6 to 12 years was carried. Total 50 patients of age group 6 to 12 years were analyzed for their oral microflora and then checked for the antibiotic susceptibility test. The samples that were collected were incubated at 37°C for 48 hours. Once dispersed samples were taken and Gram staining was done, also they were spread on to a number of freshly prepared agar plates and incubated to allow cells to form microbial colony. The result showed microflora common in all types, Gram-positive facultative anaerobic rods and cocci. In normal children Gram-positive facultative anaerobic and fermenting cocci were predominant where as in children with caries growth of microbiota that were Gram-negative and positive, capnophilic, motile and anaerobic rods and cocci belonging to members of genera S. mutans and A. actinomycetemcomitans was seen. By the present study it has been concluded that the number of bacteria determined by microscopic counts was twice as high in caries patients as in healthy sites, and also recommended that amoxicillin, ampicillin and amikacin are the most effective antibacterial drugs for the treatment of dental caries.

  19. Socioeconomic Disparity in Later-Year Group Trajectories of Depressive Symptoms: Role of Health and Social Engagement Change.

    Science.gov (United States)

    Lee, Hyunjoo; Park, Sojung; Kwon, Eunsun; Cho, Joonyoung

    2017-06-01

    This study explored heterogeneous change patterns of South Korean older adults' depressive symptoms by poverty status, focusing on health status and social engagement changes. We used data from four waves (2006-2012) of the Korean Longitudinal Study of Aging (KLoSA). Our sample contained 2461 poor and 1668 non-poor individuals. All were 65 years old or older at baseline. We used latent class growth analysis to identify trajectory groups' depressive symptoms. Multinomial logistic regression was used to examine how a range of changes in health conditions and social engagement was associated with trajectories among poor and non-poor participants. Among the poor, five heterogeneous trajectories with clear patterns were identified: high-to-moderate, stable-high, slightly-increasing, steeply-increasing, and stable-low. Among non-poor, high-to-moderate, steeply-increasing, and stable-low groups were found. A decrease in health conditions was the most vulnerable subgroup's (steeply-increasing) primary risk factor. Poor older adults who reduced participation in, or decreased contact with, social networks were likely to belong to the steeply-increasing group. Our study provides impetus for organizational and/or environmental support systems to facilitate social engagement among poor older adults. Future research should examine whether the significance of social engagement among poor elders applies in less-developed and developed countries.

  20. A trial of team-based versus small-group learning for second-year medical students: does the size of the small group make a difference?

    Science.gov (United States)

    Willett, Laura Rees; Rosevear, G Craig; Kim, Sarang

    2011-01-01

    Team-based learning is a large-group instructional modality intended to provide active learning with modest faculty resources. The goal is to determine if team-based learning could be substituted for small-group learning in case sessions without compromising test performance or satisfaction. One hundred and sixty-seven students were assigned to team-based or small-group learning for 6 case discussion sessions. Examination scores and student satisfaction were compared. Instruction modality had no meaningful effect on examination score, 81.7% team based versus 79.7% small-group, p=.56 after multivariate adjustment. Student satisfaction was lower with team-based learning, 2.45 versus 3.74 on a 5-point scale, pgroups influenced the preference for small-group learning. Team-based learning does not adversely affect examination performance. However, student satisfaction may be inferior, especially if compared to instruction in very small groups of 10 or fewer students.

  1. Hall effect in La0.6Sr0.4MnO3 thin films

    International Nuclear Information System (INIS)

    Granada, M.; Maiorov, B.; Sirena, M.; Steren, L.B.; Guimpel, J.

    2004-01-01

    We studied the temperature and thickness dependence of the transport properties of La 0.6 Sr 0.4 MnO 3 films. Hall voltage and magnetoresistance measurements on 10 and 150 nm thick films were performed with this purpose. From the ordinary Hall component, we calculated the density of carriers, which has hole-character and is systematically lower than that expected from the chemical composition of the manganite in both samples. Localization effects observed at low temperature in the resistivity of the thinner film, associated with the substrate-induced disorder, are correlated with a decrease of the density of carriers

  2. Polarized beam asymmetry for. gamma. d. -->. Peta in the energy range 0. 4-0. 8 GeV

    Energy Technology Data Exchange (ETDEWEB)

    Adamyan, F.V.; Arustamyan, G.V.; Galumyan, P.I.; Grabsky, V.H.; Hakopyan, H.H.; Karapetyan, V.V.; Vartapetyan, H.A.

    1983-01-01

    Measurements of the polarized beam asymmetry for deuteron photodisintegration ..gamma..d ..-->.. Peta have been carried out in the energy range E/sub ..gamma../ = 0.4-0.8 GeV and at angles theta/sub p//sup cm/ = 45/sup 0/-75/sup 0/. The results obtained are in disagreement with theoretical predictions which take into account the dibaryon resonance contribution. The data qualitative analysis indicates the weakness of isoscalar dibaryon amplitudes near E/sub ..gamma../ = 400 MeV. 8 references, 1 figure.

  3. Estimation of Electron Dose Delivered by a 0.4 MeV Accelerator from Bremsstrahlung Dose Measurements

    DEFF Research Database (Denmark)

    Karadjov, A. G.; Hansen, Jørgen-Walther

    1980-01-01

    Determination of a 0.4 MeV electron dose from a bremsstrahlung dose measurement using a converter-detector system is considered. The detector used is a Frickle dosimeter, and the converters are aluminum, copper and lead foils. Optimal converter thickness is ascertained experimentally for each mat...... materials within a Z-range of 13–82. A linear relation is found between bremsstrahlung dose and electron dose ranging from 2 to 20 Mrad. Finally the effect of converter area on detector response is studied....

  4. A SUBCHRONIC INHALATION STUDY OF FISCHER 344 RATS EXPOSED TO 0, 0.4, 1.4 OR 4.0 PPM ACROLEIN

    International Nuclear Information System (INIS)

    KUTZMAN, R.S.

    1981-01-01

    Fischer 344 rats were exposed to 0.0, 0.4, 1.4, or 4.0 ppm acrolein for 62 days. The major objective of the study was to relate the results of a series of pulmonary function tests to biochemical and pathological alterations observed in the lung. Cytological and reproductive potential endpoints were also assessed after acrolein exposure. Rats were exposed to acrolein for 6 hours/day, 5 days/week for 62 days. Mortality was observed only in the 4.0 ppm chamber where 32 of 57 exposed males died; however, none of the 8 exposed females died. Most of the mortality occurred within the first 10 exposure days. Histologic examination indicated that the animals died of acute bronchopneumonia. The surviving males and females exposed to 4.0 ppm acrolein gained weight at a significantly slower rate than control animals. The growth of both sexes in the 0.4 and 1.4 ppm groups was similar to that of their respective controls. Histopathologic examination of animals after 62 days of exposure revealed bronchiolar epithelial necrosis and sloughing, bronchiolar edema with macrophages, and focal pulmonary edema in the 4.0 ppm group. These lesions were, in some cases, associated with edema of the trachea and peribronchial lymph nodes, and acute rhinitis which indicated an upper respiratory tract effect of acrolein. Of particular interest was the variability of response between rats in the 4.0 ppm group, some not affected at all while others were moderately affected. Intragroup variability in toxicity was also apparent in the 1.4 ppm exposure group where only 3 of 31 animals examined had lesions directly related to acrolein exposure. Extra respiratory organs appeared unaffected

  5. Socio-Demographic and Lifestyle Factors Predict 5-Year Changes in Adiposity among a Group of Black South African Adults

    Directory of Open Access Journals (Sweden)

    Cornelie Nienaber-Rousseau

    2017-09-01

    Full Text Available The rising prevalence of obesity and excessive adiposity are global public health concerns. Understanding determinants of changes in adiposity over time is critical for informing effective evidence-based prevention or treatment. However, limited information is available to achieve this objective. Cultural, demographic, environmental, and behavioral factors including socio-economic status (SES likely account for obesity development. To this end, we related these variables to anthropometric measures in 1058 black adult Tswana-speaking South Africans who were HIV negative in a prospective study over five years. Body mass index (BMI and waist circumference increased in both sexes, whereas triceps skinfold thickness remained the same. Over the five years, women moved to higher BMI categories and more were diagnosed with central obesity. Age correlated negatively, whereas SES, physical activity, energy, and fat intake correlated positively with adiposity markers in women. In men, SES, marital status, physical activity, and being urban predicted increases in adiposity. For women, SES and urbanicity increased, whereas menopause and smoking decreased adiposity. Among men, smokers had less change in BMI than those that never smoked over five years. Our findings suggest that interventions, focusing on the urban living, the married and those with the highest SES—the high-risk groups identified herein—are of primary importance to contain morbidity and premature mortality due to obesity in black South Africans.

  6. Single crystal growth, magnetic and thermal properties of perovskite YFe{sub 0.6}Mn{sub 0.4}O{sub 3} single crystal

    Energy Technology Data Exchange (ETDEWEB)

    Xie, Tao [School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai 201418 (China); Synthetio Single Crystal Research Center, Shanghai Institute of Ceramic, Chinese Academy of Sciences, Shanghai 200050 (China); Key Laboratory of Transparent and Opto-functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050 (China); Shen, Hui, E-mail: hshen@sit.edu.cn [School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai 201418 (China); Zhao, Xiangyang; Man, Peiwen [Synthetio Single Crystal Research Center, Shanghai Institute of Ceramic, Chinese Academy of Sciences, Shanghai 200050 (China); Key Laboratory of Transparent and Opto-functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050 (China); Wu, Anhua, E-mail: wuanhua@mail.sic.ac.cn [Synthetio Single Crystal Research Center, Shanghai Institute of Ceramic, Chinese Academy of Sciences, Shanghai 200050 (China); Key Laboratory of Transparent and Opto-functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050 (China); Su, Liangbi [Synthetio Single Crystal Research Center, Shanghai Institute of Ceramic, Chinese Academy of Sciences, Shanghai 200050 (China); Key Laboratory of Transparent and Opto-functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050 (China); Xu, Jiayue, E-mail: xujiayue@sit.edu.cn [School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai 201418 (China)

    2016-11-01

    High quality YFe{sub 0.6}Mn{sub 0.4}O{sub 3} single crystal was grown by floating zone technique using a four-mirror-image-furnace under flowing air. Powder X-ray diffraction gives well evidence that the specimen has an orthorhombic structure, with space group Pbnm. Temperature dependence of the magnetizations of YFe{sub 0.6}Mn{sub 0.4}O{sub 3} single crystal were studied under ZFC and FC modes in the temperature range from 5 K to 400 K. A clear spin reorientation transition behavior (Γ{sub 4}→Γ{sub 1}) is observed in the temperature range of 322–316 K, due to the substitution of Mn at the Fe site of YFeO{sub 3}. Its Néel temperature is around 385 K. Moreover, the spin reorientation is verified by the change of magnetic hysteresis loops of the sample along [001] axis in the temperature range of 50–385 K. The thermal properties of the sample were measured by the differential scanning calorimeter (DSC) from 300 K to 500 K, which also clearly appear anomaly in the spin reorientation region. - Highlights: • High quality YFe{sub 0.6}Mn{sub 0.4}O{sub 3} single crystal was grown by floating zone technique. • The thermal properties appear anomaly in the spin reorientation region. • A clear spin reorientation transition behavior (Γ{sub 4}→Γ{sub 1}) is observed in the temperature range of 322–316 K, due to the substitution of Mn at the Fe site of YFeO{sub 3}.

  7. 4 years of successful knowledge transfer - the nuclear technology training center of the TUeV Nord Group

    International Nuclear Information System (INIS)

    Willenbockel, I.; Tietze, U.

    2007-01-01

    In connection with the 2002 amendment to the German Atomic Energy Act, the topics of generational change and maintenance of competence grew in importance and necessitated new solution approaches. To this end, various activities were launched, with the aim of conducting conceptual analyses of these topics. Examples include the 'National Competence Network for Nuclear Technology' (Nationaler Kompetenzverbund fuer Kerntechnik), various networks established by colleges and universities, the 'Knowledge Management for the Maintenance and Transfer of Competence in Reactor Safety' (Wissensmanagement zum Kompetenzerhalt und -transfer in der Reaktorsicherheit) workshop held in 2001 in Garching near Munich (Germany) and the 'Ad-hoc Workgroup on the Maintenance of Competence' (Ad-hoc-Arbeitskreis Kompetenzerhalt) of the VdTUeV. The nuclear technology departments of the TUeV Nord Group were aware of te challenges associated with the generational change early on. By establishing the 'Nuclear Technology Training Center' (Ausbildungszentrum fuer Kerntechnik, AfK), the TUeV Nord Group intended to ensure the required knowledge transfer during the generational change as well as maintain the renowned high qualification as regards the subject of nuclear technology and thus continue to provide - in the sense of social responsibility - crucial contribution to the long-term safety of nuclear plants. Four years have passed since the training center held the first courses in the fall of 2002. Up to now, more than 350 participants have been trained in the courses conducted by the AfK. In the opinion of the TUeV Nord Group, the activities of the AfK have laid the foundation for a successful change of generations within the group's nuclear technology organizations. (orig.)

  8. Martensite transformation kinetics in 9Cr–1.7W–0.4Mo–Co ferritic steel

    Energy Technology Data Exchange (ETDEWEB)

    Gao, Qiuzhi, E-mail: neuqgao@163.com [School of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao, Hebei 066000 (China); Wang, Cong; Qu, Fu; Wang, Yingling [School of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao, Hebei 066000 (China); Qiao, Zhixia [School of Mechanical Engineering, Tianjin University of Commerce, Tianjin 300134 (China)

    2014-10-15

    Highlights: • The obtained M{sub s} temperatures of samples austenitized at 1150 °C are higher than at 900 °C. • Martensite-start transformation is slower for austenitizing at 1150 °C than at 900 °C. • Martensite transformation was controlled by nucleation rate. • Growth of martensite plates was controlled by thermal activation of atoms. - Abstract: Martensite transformation features in the 9Cr–1.7W–0.4Mo–Co ferritic steel, was conducted on a Netzsch Differential Thermal Analysis (DTA), after austenitized at 900 °C and 1150 °C followed by cooling at various rates to room temperature were studied. A martensite transformation kinetics model based on assumption of continuous nucleation and consideration of impingement was introduced to investigate the influence of austenitizing temperature and cooling rate on the martensite transformation behaviors. The obtained interface velocity and the activation energy for interface-controlling growth are lower than 10{sup −5} m/s and 40 kJ/mol, respectively, according to the fitted data. Both indicated that martensite transformation in the 9Cr–1.7W–0.4Mo–Co ferritic steel was controlled by nucleation rate, and that growth of plates was controlled by thermal activation of atoms.

  9. Martensite transformation kinetics in 9Cr–1.7W–0.4Mo–Co ferritic steel

    International Nuclear Information System (INIS)

    Gao, Qiuzhi; Wang, Cong; Qu, Fu; Wang, Yingling; Qiao, Zhixia

    2014-01-01

    Highlights: • The obtained M s temperatures of samples austenitized at 1150 °C are higher than at 900 °C. • Martensite-start transformation is slower for austenitizing at 1150 °C than at 900 °C. • Martensite transformation was controlled by nucleation rate. • Growth of martensite plates was controlled by thermal activation of atoms. - Abstract: Martensite transformation features in the 9Cr–1.7W–0.4Mo–Co ferritic steel, was conducted on a Netzsch Differential Thermal Analysis (DTA), after austenitized at 900 °C and 1150 °C followed by cooling at various rates to room temperature were studied. A martensite transformation kinetics model based on assumption of continuous nucleation and consideration of impingement was introduced to investigate the influence of austenitizing temperature and cooling rate on the martensite transformation behaviors. The obtained interface velocity and the activation energy for interface-controlling growth are lower than 10 −5 m/s and 40 kJ/mol, respectively, according to the fitted data. Both indicated that martensite transformation in the 9Cr–1.7W–0.4Mo–Co ferritic steel was controlled by nucleation rate, and that growth of plates was controlled by thermal activation of atoms

  10. Association of body mass index and waist circumference with hypertension among school children in the age group of 5-16 years belonging to lower income group and middle income group in National Capital Territory of Delhi

    Directory of Open Access Journals (Sweden)

    Umesh Kapil

    2013-01-01

    Full Text Available Background and Objectives: Hypertension is one of the most common diseases world-wide and the prevalence in school-aged children appears to be increasing perhaps as a result of increased prevalence of obesity. Thus, the present study was planned to establish an association between body mass index (BMI and waist circumference (WC with hypertension amongst school children in the age group of 5-16 years belonging to lower income group (LIG and middle income group (MIG in National Capital Territory of Delhi. Materials and Methods: Population proportionate to size methodology was adopted to select 30 clusters/schools in each LIG and MIG category. About 170 children from each school were selected randomly with the help of random number tables. Anthropometric measurements of weight, height and WC and blood pressure measurements were taken by using standard methodology. Results: The prevalence of high systolic blood pressure (SBP in LIG and MIG school population was 2.8% and 4.1% respectively. Similarly, the prevalence of high diastolic blood pressure (DBP in LIG and MIG school population was 2.7% and 4.2%, respectively. Statistical positive correlation was observed between BMI and WC with SBP and DBP. Thus, it can be inferred that children with high WC and BMI are more likely to have hypertension.

  11. Early colonization with a group of Lactobacilli decreases the risk for allergy at five years of age despite allergic heredity.

    Directory of Open Access Journals (Sweden)

    Maria A Johansson

    Full Text Available BACKGROUND: Microbial deprivation early in life can potentially influence immune mediated disease development such as allergy. The aims of this study were to investigate the influence of parental allergy on the infant gut colonization and associations between infant gut microbiota and allergic disease at five years of age. METHODS AND FINDINGS: Fecal samples were collected from 58 infants, with allergic or non-allergic parents respectively, at one and two weeks as well as at one, two and twelve months of life. DNA was extracted from the fecal samples and Real time PCR, using species-specific primers, was used for detection of Bifidobacterium (B. adolescentis, B. breve, B. bifidum, Clostridium (C. difficile, a group of Lactobacilli (Lactobacillus (L. casei, L. paracasei and L. rhamnosus as well as Staphylococcus (S. aureus. Infants with non-allergic parents were more frequently colonized by Lactobacilli compared to infants with allergic parents (p = 0.014. However, non-allergic five-year olds acquired Lactobacilli more frequently during their first weeks of life, than their allergic counterparts, irrespectively of parental allergy (p = 0.009, p = 0.028. Further the non-allergic children were colonized with Lactobacilli on more occasions during the first two months of life (p = 0.038. Also, significantly more non-allergic children were colonized with B. bifidum at one week of age than the children allergic at five years (p = 0.048. CONCLUSION: In this study we show that heredity for allergy has an impact on the gut microbiota in infants but also that early Lactobacilli (L. casei, L. paracasei, L. rhamnosus colonization seems to decrease the risk for allergy at five years of age despite allergic heredity.

  12. Effects of Acute Bleeding Followed by Hydroxyethyl Starch 130/0.4 or a Crystalloid on Propofol Concentrations, Cerebral Oxygenation, and Electroencephalographic and Haemodynamic Variables in Pigs

    Directory of Open Access Journals (Sweden)

    Aura Silva

    2014-01-01

    Full Text Available Bleeding changes the haemodynamics, compromising organ perfusion. In this study, the effects of bleeding followed by replacement with hydroxyethyl starch 130/0.4 (HES or lactated Ringer’s (LR on cerebral oxygenation and electroencephalogram-derived parameters were investigated. Twelve young pigs under propofol-remifentanil anaesthesia were bled 30 mL/kg and, after a 20-minute waiting period, volume replacement was performed with HES (GHES; N=6 or LR (GRL; N=6. Bleeding caused a decrease of more than 50% in mean arterial pressure (P<0.01 and a decrease in cerebral oximetry (P=0.039, bispectral index, and electroencephalogram total power (P=0.04 and P<0.01, resp., while propofol plasma concentrations increased (P<0.01. Both solutions restored the haemodynamics and cerebral oxygenation similarly and were accompanied by an increase in electroencephalogram total power. No differences between groups were found. However, one hour after the end of the volume replacement, the cardiac output (P=0.03 and the cerebral oxygenation (P=0.008 decreased in the GLR and were significantly lower than in GHES (P=0.02. Volume replacement with HES 130/0.4 was capable of maintaining the cardiac output and cerebral oxygenation during a longer period than LR and caused a decrease in the propofol plasma concentrations.

  13. Crystal structure, magnetic and magnetocaloric properties of aluminum-doped La{sub 0.6}Sr{sub 0.4}MnO{sub 3} perovskites

    Energy Technology Data Exchange (ETDEWEB)

    Elhamza, Amal; Dhahri, J. [Universite de Monastir, Laboratoire de la Matiere Condensee et des Nanosciences, Monastir (Tunisia); Rhouma, F.I.H. [Centre de Recherche des Sciences et Technologies de l' Energie, Laboratoire de Photovoltaique de Semi-Conducteurs et de Nanostructures, Hammam-Lif (Tunisia); Hlil, E.K. [CNRS-Universite Joseph Fourier, Institut Neel, Grenoble (France)

    2017-05-15

    In this paper, we report on the structural, magnetic and magnetocaloric properties of a series of nanocrystallines La{sub 0.6}Sr{sub 0.4}Mn{sub 1-x}Al{sub x}O{sub 3} (0 ≤ x ≤ 0.2) which were prepared by the sol-gel method. The X-ray powder diffraction showed that all our synthesized samples were of a single phase and have crystallized in the hexagonal symmetry with R anti 3c space group. Magnetic measurements showed that the sample exhibits a ferromagnetic-to-paramagnetic phase transition at a Curie temperature close to 206 K. The maximum value of the magnetic entropy change vertical stroke ΔS{sub M}{sup max} vertical stroke was found to be 1.09 J kg{sup -1} K{sup -1} for an applied magnetic field of 5T. At this value of magnetic field, the relative cooling power was 141 J kg{sup -1}. Our result on magnetocaloric properties suggests that La{sub 0.6}Sr{sub 0.4}Mn{sub 1-x}Al{sub x}O{sub 3} nanopowder with (0 ≤ x ≤ 0.2) is attractive as a potential refrigerant for high-temperature magnetic refrigeration. (orig.)

  14. Attempted suicide in the elderly: characteristics of suicide attempters 70 years and older and a general population comparison group.

    Science.gov (United States)

    Wiktorsson, Stefan; Runeson, Bo; Skoog, Ingmar; Ostling, Svante; Waern, Margda

    2010-01-01

    To identify factors associated with attempted suicide in the elderly. Social, psychological, and psychiatric characteristics were compared in suicide attempters (70 years and older) and a representative population sample. Emergency departments at five hospitals in western Sweden and a representative sample of the elderly population. Persons with Mini Mental State Examination (MMSE) score age 80 years). Comparison subjects matched for gender and age group (N = 408) were randomly selected among participants in our general population studies. Symptoms were rated with identical instruments in cases and comparison subjects. The examination included the MMSE and tests of short- and long-term memory, abstract thinking, aphasia, apraxia, and agnosia. Depressive symptomatology was measured using the Montgomery-Asberg Depression Rating Scale, and major and minor depressions were diagnosed according to Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, using symptom algorithms. Factors associated with attempted suicide included being unmarried, living alone, low education level, history of psychiatric treatment, and previous suicide attempt. There was no association with dementia. Odds ratios were increased for both major (odds ratio [OR]: 47.4, 95% confidence interval [CI]: 19.1-117.7) and minor (OR: 2.6, 95% CI: 1.5-4.7) depressions. An association was observed between perceived loneliness and attempted suicide; this relationship was independent of depression (OR: 2.8, 95% CI: 1.3-6.1). Observed associations mirrored those previously shown for completed suicide. Results may help to inform clinical decisions regarding suicide risk evaluation in this vulnerable and growing age group.

  15. Collaborative-group testing improves learning and knowledge retention of human physiology topics in second-year medical students.

    Science.gov (United States)

    Vázquez-García, Mario

    2018-06-01

    The present study examined the relationship between second-year medical students' group performance and individual performance in a collaborative-learning environment. In recent decades, university professors in the scientific and humanistic disciplines have successfully put into practice different modalities of collaborative approaches to teaching. Essentially, collaborative approach refers to a variety of techniques that involves the joint intellectual effort of a small group of students, which encourages interaction and discussion among students and professors. The present results show the efficacy of collaborative learning, which, furthermore, allowed students to participate actively in the physiology class. Average student's grades were significantly higher when they engaged in single-best-response, multiple-choice tests as a student team, compared with taking the same examinations individually. The method improved notably knowledge retention, as learning is more effective when performed in the context of collaborative partnership. A selected subset of questions answered wrongly in an initial test, both individually and collectively, was used on a second test to examine student retention of studied material. Grade averages were significantly improved, both individually and groupwise, when students responded to the subset of questions a second time, 1, 2, or 3 wk after the first attempt. These results suggest that the collaborative approach to teaching allowed a more effective understanding of course content, which meant an improved capacity for retention of human physiology knowledge.

  16. Study of family factors in association with behavior problems amongst children of 6-18 years age group.

    Science.gov (United States)

    Jogdand, Sandip S; Naik, Jd

    2014-07-01

    The 'behaviour problems' are having major impact on child's bodily and social development. The family provides emotional support to an individual as well as plays a major role in the formation of one's personality. The quality and nature of the parental nurturance that the child receives will profoundly influence his future development. The knowledge of these family factors associated with behaviour problems may be helpful to identify at risk children. To study the family factors associated with behaviour problems amongst children of 6-18 Yrs age group. an adopted urban slum area of Govt. Medical College, Miraj Dist-Sangli. Cross sectional study. the sample size was calculated based upon 40% prevalence obtained in pilot study. Total 600 Children in the age group of 6-18 years residing in the urban slum area and their parents were interviewed with the help of predesigned, pretested proforma. chi-square test and risk estimate with Odd's ratio. Our study result reveals significant association between prevalence of behaviour problems with absence of either or both real parents and alcoholism in the parent or care taker. The behaviour problems have good prognosis if they are recognized earlier. Family has great role in prevention of behaviour problems in children, so parental counseling may be helpful.

  17. An ongoing six-year innovative osteoporosis disease management program: challenges and success in an IPA physician group environment.

    Science.gov (United States)

    Woo, Ann; Hittell, Jodi; Beardsley, Carrie; Noh, Charles; Stoukides, Cheryl A; Kaul, Alan F

    2004-01-01

    The goal of this ongoing comprehensive osteoporosis disease management initiative is to provide the adult primary care physicians' (PCPs) offices with a program enabling them to systematically identify and manage their population for osteoporosis. For over six years, Hill Physicians Medical Group (Hill Physicians) has implemented multiple strategies to develop a best practice for identifying and treating members who were candidates for osteoporosis therapy. Numerous tools were used to support this disease management effort, including: evidence-based clinical practice guidelines, patient education sessions, the Simple Calculated Osteoporosis Risk Estimation (SCORE) questionnaire tool, member specific reports for PCPs, targeted member mailings, office-based Peripheral Instantaneous X-ray Imaging (PIXI) test and counseling, dual x-ray absorptiometry (DEXA) scan guidelines, and web-based Electronic Simple Calculated Osteoporosis Risk Estimation (eSCORE) questionnaire tools. Hill Physicians tabulated results for patients who completed 2649 SCORE tests, screened 978 patients with PIXI tests, and identified 338 osteopenic and 124 osteoporotic patients. The preliminary results of this unique six-year ongoing educational initiative are slow but promising. New physician offices express interest in participating and those offices that have participated in the program continue to screen for osteoporosis. Hill Physicians' message is consistent and is communicated to the physicians repeatedly in different ways in accordance with the principles of educational outreach. Physicians who have conducted the program have positive feedback from their patients and office staff and have begun to communicate their experience to their peers.

  18. Electromagnetic design of a β=0.4 superconducting spoke resonator for a high intensity proton linac

    International Nuclear Information System (INIS)

    Pathak, Abhishek; Krishnagopal, Srinivas

    2015-01-01

    Here we present electromagnetic design simulations of a superconducting single-spoke resonator with a geometrical beta of 0.4 and operating at 325 MHz for a high intensity proton linac (HIPL). The spoke equatorial and base parameters were optimized to minimize the peak electric and peak magnetic fields and maximize the shunt impedance, while keeping the same resonant frequency. Variation of the surface magnetic fields was investigated as a function of the spoke base shape, and it was found that an elliptical profile is preferred over a circular or racecourse profile with E peak /E acc =4.71, E peak /E acc =4.33 (mT/(MV/m)) and R/Q=272 Ω. (author)

  19. Evidence for phonon-mediated coupling in superconducting Ba0.6K0.4BiO3

    International Nuclear Information System (INIS)

    Hinks, D.G.; Dabrowski, B.; Richards, D.R.; Jorgensen, J.D.; Pei, S.; Zasadzinski, J.F.

    1989-01-01

    Superconducting Ba 0.6 K 0.4 BiO 3 , with a T c of 30 K, shows a large 18 O isotope effect which indicates that phonons are involved in the pairing mechanism. Infrared reflectivity measurements indicate a value for the superconducting gap consistent with moderate coupling (2Δ/k T c = 3.5 ± 0.5). A mediating energy for pairing of about 40 meV would be required to obtain a T c of 30 K. Strong coupling of electrons by optical phonons (which are present in this material with energies up to 80 meV) could account for the observed transition temperature. Recent tunneling spectroscopy shows the presence of strongly coupled optical phonons in the 40 to 70 meV region, indicating that superconductivity in this material may be phonon mediated

  20. Oxygen nonstoichiometry and ionic transport properties of La0.4Sr0.6CoO3-delta .

    Science.gov (United States)

    Sitte, W; Bucher, E; Benisek, A; Preis, W

    2001-09-01

    Homogeneous samples of La0.4Sr0.6CoO3-delta were obtained by the glycine nitrate process. The oxygen nonstoichiometry was determined from oxygen exchange measurements as a function of oxygen partial pressure (10(-4) bar PO2 PO2-range between 10(-4) and 10(-2) bar to yield D and the ionic conductivity sigma(i) from the long time solution of the diffusion equation. Values for D from polarization measurements at T= 775 degrees C and from oxygen exchange measurements at T= 725 degrees C are in good agreement with each other. D and sigma(1) increase with increasing PO2 (10(-4) to 10(-2) bar). The ionic conductivity shows a maximum at 3-delta approximately 2.82 and decreases with decreasing oxygen content indicating the possible formation of vacancy ordered structures.

  1. Secondary electron emission from metals irradiated by 0.4-3 MeV gamma-quanta

    International Nuclear Information System (INIS)

    Grudskij, M.Ya.; Malyshenkov, A.V.; Smirnov, V.V.

    1975-01-01

    Experimental and calculational data were considered on the secondary electron emission outgoing from metal targets of an equilibrium thickness irradiated by gamma-quanta fluxes with the energies from 0.4 to 3 MeV. New experimental data are presented. Characteristics of emission were measured by two methods: by magnetic spectrometers with a transverse magnetic field, and by means of an electrometric device with using radioisotopic gamma-sources of 198 Au, 137 Cs, 60 Co and 24 Na. The dependence of the electron emission on the atomic number of the target material was studied. For this purpose the parameters of emissions outgoing from Al-, Cu-, Cd-, Pb- and Au-targets were measured. The advantages and shortcomings of the known methods of calculating the second electron emission were discussed. The obtained experimental and calculational results on studying electrons were compared with those known from literature, and possible sources of systematic errors were discussed

  2. Comparative Investigation on 0.4 inch SBLOCA Scenario with Single and Dual Train Passive Safety Injection Systems using SMART-ITL

    Energy Technology Data Exchange (ETDEWEB)

    Park, Hyun-Sik; Bae, Hwang; Ryu, Sung-Uk; Jeon, Byong-Guk; Yang, Jin-Hwa; Yun, Eun-Koo; Choi, Nam-Hyun; Min, Kyoung-Ho; Shin, Yong-Cheol; Bang, Yoon-Gon; Kim, Myoung-Jun; Seo, Chan-Jong; Yi, Sung-Jae [Korea Atomic Energy Research Institute, Daejeon (Korea, Republic of)

    2016-10-15

    The Standard Design Approval (SDA) for SMART was certificated in 2012 at the Korea Atomic Energy Research Institute (KAERI). In December 2015, Saudi Arabia and Korea started conducting a three-year project of Pre-Project Engineering (PPE) to prepare a Preliminary Safety Analysis Report (PSAR) and to review the feasibility of constructing SMART reactors in Saudi Arabia. In addition, an Integral Test Loop for the SMART design (SMART-ITL, or FESTA) has been constructed and it finished its commissioning tests in 2012. Consequently, a set of Design Base Accident (DBA) scenarios have been simulated using SMART-ITL. In this paper, a comparative investigation was performed on 0.4 inch SBLOCA scenario with single and dual train passive safety injection systems using SMART-ITL. In this paper, the effect of the train number of PSIS on a SBLOCA scenario is investigated for a break size of 0.4 inch. The single and dual train tests show a similar trend in general but the injected water migrates slightly differently in the RV and is discharged through the break nozzle. The parameters of the RV pressure, RV water level, accumulated break mass, and injection flowrates from the CMT and SIT were compared. Compared with the single train test, the increased injection rates from the two trains of the PSIS during the dual train test raised the RV water level, ensuring the safety of the reactor core.

  3. Hot working mechanisms and texture development in Mg-3Sn-2Ca-0.4Al alloy

    International Nuclear Information System (INIS)

    Dharmendra, C.; Rao, K.P.; Prasad, Y.V.R.K.; Hort, N.; Kainer, K.U.

    2012-01-01

    Hot deformation mechanisms in Mg-3Sn-2Ca (TX32) alloy containing 0.4% Al are evaluated in the temperature and strain rate ranges of 300–500 °C and 0.0003–10 s −1 using processing map and kinetic analysis. The evolution of microstructure and texture during high temperature compression of the alloy has been studied using an electron back scatter diffraction (EBSD) technique. The processing map for hot working revealed two domains of dynamic recrystallization (DRX) occurring in the temperature and strain rate ranges of: (1) 300–360 °C and 0.0003–0.001 s −1 and (2) 400–500 °C and 0.005–0.7 s −1 , which are the two safe hot workability windows for this alloy. A regime of flow instability occurs at higher strain rates and lower temperatures where adiabatic shear banding and flow localization are the microstructural manifestations. The onset of DRX during compression at lower temperatures and strain rates (Domain 1) resulted in a fine, partially recrystallized and necklaced grain microstructure along with a texture where the basal poles are spread along 30° from the compression direction. Specimens deformed at temperatures higher than 450 °C (Domain 2) resulted in a fully recrystallized microstructure and an almost random crystallographic texture, which was attributed to the significant occurrence of pyramidal slip and associated cross-slip. -- Highlights: ► Processing map revealed two DRX domains for hot working of Mg-3Sn-2Ca-0.4Al alloy. ► The alloy exhibited flow instability at lower temperatures and higher strain rates. ► Activation energy values for deformation are high due to the back stress. ► Basal poles spread around 30° to the compression axis for Domain 1 peak condition. ► Texture got randomized at high temperature and strain rate conditions in Domain 2.

  4. Studies on Cd1Se0.6Te0.4 Thin Films by Spectroscopic and Diffractometer Characterization

    Directory of Open Access Journals (Sweden)

    Cliff Orori Mosiori

    2017-09-01

    Full Text Available Cadmium selenide tellurium is a compound containing cadmium, tellurium and selenium elements forming a combined solid. Hall measurements suggest that it is an n-type semiconductor. Related optical studies indicate that is transparent to infra-red radiation. Structural studies clearly show that it has a wurtzite, sphalerite crystalline forms. Cadmium is a toxic heavy metal, and selenium is only toxic in large amounts or doses. By this toxicity, cadmium selenide is a known to be carcinogen to humans; however, this does not stop investigating it for optoelectronic applications. Current research has narrowed down to investigating cadmium selenide when in the form of nanoparticles. Cadmium selenide finds applications has found applications in opto-electronic devices like laser diodes, biomedical imaging, nano-sensing, high-efficiency solar cells and thin-film transistors. By chemical bath deposition, Cd1Se0.6Te0.4 thin films were grown onto glass. Tellurium was gradually introduced as an impurity and its crystalline structure and optical properties were investigated by XRD and UV-VIS spectroscopy. The main Cd1Se0.6Te0.4/glass characteristics were correlated with the conditions of growing and post-growth treatment and it was found out that films were homogeneous films with controllable thickness onto the glass substrate and suitable for n-type “sandwich” heterostructures applications. Comparison of the intensities of equivalent reflexions provided a test for the internal consistency of the measurements. Equivalent reflexions in two specimens differed on average by 1.4 % and 0.6% from the mean measured intensity, attesting to the high internal consistency of measurements from extended-face crystals. By comparison from data obtained from all samples showed their average deviation from the mean to be 0.9 %.

  5. Investigation on femto-second laser irradiation assisted shock peening of medium carbon (0.4% C) steel

    Energy Technology Data Exchange (ETDEWEB)

    Majumdar, Jyotsna Dutta, E-mail: jyotsna@metal.iitkgp.ernet.in [Dept. of Metal. & Maters. Eng., I. I. T., Kharagpur, WB 721302 (India); Gurevich, Evgeny L., E-mail: gurevich@lat.rub.de [Ruhr-Universität Bochum, Ls. Laseranwendungstechnik, Universitätsstr. 150, 44801 Bochum (Germany); Kumari, Renu, E-mail: renumetalbit@gmail.com [Dept. of Metal. & Maters. Eng., I. I. T., Kharagpur, WB 721302 (India); Ostendorf, Andreas, E-mail: andreas.ostendorf@ruhr-uni-bochum.de [Ruhr-Universität Bochum, Ls. Laseranwendungstechnik, Universitätsstr. 150, 44801 Bochum (Germany)

    2016-02-28

    Graphical abstract: - Highlights: • Peening effect of 0.4% C steel by femtosecond laser irradiation. • Microstructural investigation of the irradiated surface. • Residual stress decreased from 152 MPa to 140 MPa to −330 MPa by laser processing. • Decreased wear depth to a maximum of four times as compared to as-received substrate. • Mechanism of wear for both as-received and laser processed surface were established. - Abstract: In the present study, the effect of femtosecond laser irradiation on the peening behavior of 0.4% C steel has been evaluated. Laser irradiation has been conducted with a 100 μJ and 300 fs laser with multiple pulses under varied energy. Followed by laser irradiation, a detailed characterization of the processed zone was undertaken by scanning electron microscopy, and X-ray diffraction technique. Finally, the residual stress distribution, microhardness and wear resistance properties of the processed zone were also evaluated. Laser processing leads to shock peening associated with plasma formation and its expansion, formation of martensite and ferrito–pearlitic phase in the microstructure. Due to laser processing, there is introduction of residual stress on the surface which varies from high tensile (140 MPa) to compressive (−335 MPa) as compared to 152 MPa of the substrate. There is a significant increase in microhardness to 350–500 VHN as compared to 250 VHN of substrate. The fretting wear behavior against hardened steel ball shows a significant reduction in wear depth due to laser processing. Finally, a conclusion of the mechanism of wear has been established.

  6. Student Perception on Group Work and Group Assignments in Classroom Teaching: The Case of Bule Hora University Second Year Biology Students, South Ethiopia--An Action Research

    Science.gov (United States)

    Daba, Tolessa Muleta; Ejersa, Sorale Jilo; Aliyi, Sultan

    2017-01-01

    Group learning has become a common practice in schools and tertiary institutions. It provides more comfortable and supportive learning environment than solitary work. It fosters critical thinking skills, develops individual accountability, increases levels of reasoning and positive interdependence, improves problem-solving strategies and…

  7. Synthesis and structural studies on cerium substituted La0.4Ca0.6MnO3 as solid oxide fuel cell electrode material

    Science.gov (United States)

    Singh, Monika; Kumar, Dinesh; Singh, Akhilesh Kumar

    2018-04-01

    For solid oxide fuel cell electrode material, calcium doped lanthanum manganite La0.4Ca0.6MnO3 (LCMO) and cerium-incorporated on Ca-site with composition La0.40Ca0.55Ce0.05MnO3 (LCCMO) were synthesized using most feasible and efficient glycine-nitrate method. The formation of crystalline single phase was confirmed by x-ray diffraction (XRD). The Rietveld analysis reveals that both systems crystallize into orthorhombic crystal structure with Pnma space group. Additionally, 8 mole % Y2O3 stabilized ZrO2 (8YSZ) solid electrolyte was also synthesized using high energy ball mill to check the reaction with electrode materials. It was found that the substitution of Ce+4 cations in LCMO perovskite suppressed formation of undesired insulating CaZrO3 phase.

  8. LaNi1-xCoxO3-δ (x=0.4 to 0.7) cathodes for solid oxide fuel cells by infiltration

    DEFF Research Database (Denmark)

    Chrzan, Aleksander; Ovtar, Simona; Chen, Ming

    2015-01-01

    Performance of LaNi1-xCoxO3-δ (LNC) (x=0.4 to 0.7) as a cathode in solid oxide fuel cell (SOFC) is evaluated. Symmetrical cathode/electrolyte/cathode cells for electrochemical testing are prepared by infiltration of yttria stabilized zirconia (YSZ) backbone with LNC solutions. It is showed...... that the cathode infiltrated with LaNi0.5Co0.5O3-δ (LNC155) has the lowest polarization resistance and activation energy, 197 mΩ cm2 at 600 °C and 0.91 eV, respectively. Therefore it is the most promising material of the LNC group for electrochemical applications. X-ray diffraction analysis revealed that none...

  9. LaNi1-xCoxO3-δ (x=0.4 to 0.7) cathodes for solid oxide fuel cells by infiltration

    Science.gov (United States)

    Chrzan, Aleksander; Ovtar, Simona; Chen, Ming

    2016-01-01

    Performance of LaNi1-xCoxO3-δ (LNC) (x=0.4 to 0.7) as a cathode in solid oxide fuel cell (SOFC) is evaluated. Symmetrical cathode/electrolyte/cathode cells for electrochemical testing are prepared by infiltration of yttria stabilized zirconia (YSZ) backbone with LNC solutions. It is showed that the cathode infiltrated with LaNi0.5Co0.5O3-δ (LNC155) has the lowest polarization resistance and activation energy, 197 mΩ cm2 at 600 °C and 0.91 eV, respectively. Therefore it is the most promising material of the LNC group for electrochemical applications. X-ray diffraction analysis revealed that none of the materials is single-phased after heat treatment at 800 °C as they contain residues of La2O3 and La2NiO4-δ

  10. Magnetic resonance volumetric analysis of hippocampi in children in the age group of 6-to-12 years: a pilot study

    International Nuclear Information System (INIS)

    Mulani, S.J.; Kothare, S.V.; Patkar, D.P.

    2005-01-01

    Atrophy of the mesial temporal structures, especially the hippocampus, has been implicated in temporal lobe epilepsy. However, to date, there is very scant data regarding normal volumes of the hippocampus in the pediatric population. This is a pilot study to estimate the normal volumetric data for the Indian pediatric population between 6 and 12 years of age. We have also tried to understand whether age and gender have an effect on the hippocampal volumes in this age group. The study group comprised 20 children, 6-12-years old without history of epilepsy or other neurological deficits. There were nine boys and 11 girls. All scans were performed on a 1.5T GE echo speed scanner. 3D fast SPGR sequence was prescribed in the coronal plane. The images were post-processed on an Advantage Windows 3.1 workstation. Using an automated program, the same observer calculated the hippocampal area, in cubic centimeters, clockwise and anticlockwise. The clockwise/anticlockwise data were subjected to correlation analysis for detecting intra-observer agreement. The mean and SD for left and right hippocampal volumes were estimated. The lower and upper limits for normal hippocampal volumes were determined using 95% (± 2SD) limits on either side of the mean. In order to understand the effect of age on various hippocampal volumes we performed regression analysis. Mann-Whitney's test was used to test the significance of differences for gender variations. Correlation analysis established that there was intra-observer agreement. In the Indian pediatric population we have found the mean right hippocampal volume (RHV) to be 2.75 cm 3 and mean left hippocampal volume (LHV) to be 2.49 cm 3 . Mean hippocampal volume was found to be 2.67 cm 3 (SD=0.42). The upper and lower limits for hippocampal volumes were 3.51 cm 3 and 1.83 cm 3 , respectively, based on 95% (± 2SD) limits on either side of the mean. There was no effect of age or gender on the hippocampal volumes. In the Indian pediatric

  11. Magnetic resonance volumetric analysis of hippocampi in children in the age group of 6-to-12 years: a pilot study

    Energy Technology Data Exchange (ETDEWEB)

    Mulani, S.J. [Dr. Balabhai Nanavati Hospital and Research Center, Department of Radiology, Mumbai (India); PD Hinduja Hospital and Research Center, Mumbai (India); Kothare, S.V. [Dr. Balabhai Nanavati Hospital and Research Center, Department of Pediatric Neurology, Mumbai (India); St. Christopher' s Hospital for Children, Drexel University College of Medicine, Division of Child Neurology, Department of Pediatrics, Philadelphia, PA (United States); Patkar, D.P. [Dr. Balabhai Nanavati Hospital and Research Center, Department of Radiology, Mumbai (India)

    2005-07-01

    Atrophy of the mesial temporal structures, especially the hippocampus, has been implicated in temporal lobe epilepsy. However, to date, there is very scant data regarding normal volumes of the hippocampus in the pediatric population. This is a pilot study to estimate the normal volumetric data for the Indian pediatric population between 6 and 12 years of age. We have also tried to understand whether age and gender have an effect on the hippocampal volumes in this age group. The study group comprised 20 children, 6-12-years old without history of epilepsy or other neurological deficits. There were nine boys and 11 girls. All scans were performed on a 1.5T GE echo speed scanner. 3D fast SPGR sequence was prescribed in the coronal plane. The images were post-processed on an Advantage Windows 3.1 workstation. Using an automated program, the same observer calculated the hippocampal area, in cubic centimeters, clockwise and anticlockwise. The clockwise/anticlockwise data were subjected to correlation analysis for detecting intra-observer agreement. The mean and SD for left and right hippocampal volumes were estimated. The lower and upper limits for normal hippocampal volumes were determined using 95% ({+-} 2SD) limits on either side of the mean. In order to understand the effect of age on various hippocampal volumes we performed regression analysis. Mann-Whitney's test was used to test the significance of differences for gender variations. Correlation analysis established that there was intra-observer agreement. In the Indian pediatric population we have found the mean right hippocampal volume (RHV) to be 2.75 cm{sup 3} and mean left hippocampal volume (LHV) to be 2.49 cm{sup 3}. Mean hippocampal volume was found to be 2.67 cm{sup 3} (SD=0.42). The upper and lower limits for hippocampal volumes were 3.51 cm{sup 3} and 1.83 cm{sup 3}, respectively, based on 95% ({+-} 2SD) limits on either side of the mean. There was no effect of age or gender on the hippocampal

  12. Effect of tetrastarch (hydroxyethyl starch 130/0.4) on plasma creatinine concentration in cats: a retrospective analysis (2010-2015).

    Science.gov (United States)

    Yozova, Ivayla D; Howard, Judith; Adamik, Katja N

    2017-10-01

    Objectives The objective was to determine survival and changes in creatinine concentrations after administration of 6% tetrastarch (hydroxyethyl starch [HES] 130/0.4) vs crystalloids in critically ill cats. Methods The medical records were reviewed for cats admitted to the intensive care unit with at least two plasma creatinine measurements and initial concentrations not exceeding the upper reference interval. Cats were excluded if they had received HES prior to admission or if they had received fluid therapy for creatinine concentrations were evaluated as the percentage change from initial values to the maximum subsequent measurements. Cats receiving only crystalloids were assigned to the crystalloid group; cats receiving only HES or HES and crystalloids were assigned to the HES group. Results Ninety-three cats were included in the study (62 in the crystalloid group, 31 in the HES group). The total median cumulative HES dose was 94 ml/kg (range 26-422 ml/kg) and 24 ml/kg/day (range 16-42 ml/kg/day). No difference was detected between the groups for age, sex, body weight or mortality. The HES group had a significantly longer length of hospitalisation ( P = 0.012), lower albumin concentrations ( P creatinine concentrations between the groups. Moreover, there was no significant difference in maximum change in creatinine concentrations in the subgroups of cats with systemic inflammatory response syndrome or sepsis. Conclusions and relevance In this population of cats, the administration of HES did not result in a significantly greater increase in creatinine from values measured on admission or higher mortality compared with administration of crystalloids. Further prospective studies are needed to assess both safety and efficacy of HES in cats before recommendations can be made.

  13. Relations between the occurrence of hypermobility and gender in the group of children aged 6 - 10 years

    Directory of Open Access Journals (Sweden)

    Joanna Maryczkanicz

    2018-01-01

    Full Text Available Introduction:Hypermobility of joints in healthy people may be either acquired or congenital be a symptom of a connective tissue disorder such as Marfan syndrome, osteogenesis imperfecta, or Ehler-Danlos syndrome. If that occurs increased joint mobility does not have the characteristics previously mentioned teams innate, it may indicate the presence of articular hypermobility. Hypermobility otherwise called excessive joint laxity or increased their chattel. This dysfunction is based on a wider range of movement in large and small joints relative to the standards for age, gender and race, in the absence of rheumatic diseases. The aim of the study was to evaluate the relationship between hypermobility and gender of the children aged 6 - 10 years. Materials and Methods: The study was conducted in November and December 2017, in two primary schools in Szczecin. Studied 66 children, whose average age was 7 years and 10 months. To assess the prevalence of hypermobility used Beighton scale. It consists of preparation of 5 steps: slope forward from the position the hand flat on the floor, the passive hyperextension V above the finger 90, the passive thumb adduction to the volar side of the forearm hyperextension elbow joint and knee joint. The maximum number of points available is a ninth score 4 points or more indicates presence of hypermobility. Results: The results of 4 points or above on a scale Beighton was observed in 24 of 66 children. Boys was 10, and girls 14. Among girls male person with hypermobility accounted for 30.30%, and among female patients with hypermobility was 42.42% . Conclusions: There was an increased incidence of joint mobility of females than males. The need for screening tests in that group of children was also highlighted.

  14. An investigation on drug resistance of viridance group streptococci isolated from 3-12 years healthy individuals

    Directory of Open Access Journals (Sweden)

    Abasalt Borji

    2010-11-01

    Full Text Available Background: Nowadays, dental and oral infections are regarded as major threats to human health whose treatments are always prime concern of dental surgeons. Staphylococci, streptococci, actinomycetes and mycoplasma are the most common causative agents of such infections.The objective of this study was to investigate drug resistance of viridance group streptococci (VGS isolated from healthy children between 3-12 years old versus common antibiotics utilized in dentistry. The findings of this study can help dentists using the antibiotic of choice in remedial practices as well as assessment of sensitivity or resistance of VGS.Materials and Method: In this cross sectional study saliva samples from of 213 healthy children aged between 3-12 years from their buccal surface of posterior teeth were collected and after culture. species were isolated. Next, drug sensitivity test was carried out by disc diffusion technique to find out sensitivity or resistance of VGS to penicillin, erythromycin, vancomycin, clindamycin, cephotaxim and cephteriaxon.Result: Our findings revealed that resistance of VGS to antibiotics including: clindamycin, penicillin, cephteriaxon, erythromycin, vancomycin and cephotaxim was 59.6%, 52.6%, 30.5%, 12.2%, 10.8% and 1.5% and sensitivity of VGS to such antibiotics was 19.7%, 29.6%, 23%, 13.4%, 4.5% and 29.6% respectively.Conclusion: The results showed widespread resistance of VGS against chosen antibiotics, this indicates considerable use of antibiotics in this region.Controlled use and prescription of different antibiotics as well as increasing people knowledge about misuse of antibiotics in order to decrease the drug resistance is important

  15. Extending the modeling of the anisotropic galaxy power spectrum to k = 0.4 h Mpc{sup −1}

    Energy Technology Data Exchange (ETDEWEB)

    Hand, Nick; Seljak, Uroš [Astronomy Department, University of California, Berkeley, CA 94720 (United States); Beutler, Florian [Institute of Cosmology and Gravitation, University of Portsmouth, Dennis Sciama Building, Portsmouth, PO1 3FX (United Kingdom); Vlah, Zvonimir, E-mail: nhand@berkeley.edu, E-mail: useljak@berkeley.edu, E-mail: florian.beutler@port.ac.uk, E-mail: zvlah@stanford.edu [Stanford Institute for Theoretical Physics and Department of Physics, Stanford University, Stanford, CA 94306 (United States)

    2017-10-01

    We present a model for the redshift-space power spectrum of galaxies and demonstrate its accuracy in describing the monopole, quadrupole, and hexadecapole of the galaxy density field down to scales of k = 0.4 h Mpc{sup −1}. The model describes the clustering of galaxies in the context of a halo model and the clustering of the underlying halos in redshift space using a combination of Eulerian perturbation theory and N -body simulations. The modeling of redshift-space distortions is done using the so-called distribution function approach. The final model has 13 free parameters, and each parameter is physically motivated rather than a nuisance parameter, which allows the use of well-motivated priors. We account for the Finger-of-God effect from centrals and both isolated and non-isolated satellites rather than using a single velocity dispersion to describe the combined effect. We test and validate the accuracy of the model on several sets of high-fidelity N -body simulations, as well as realistic mock catalogs designed to simulate the BOSS DR12 CMASS data set. The suite of simulations covers a range of cosmologies and galaxy bias models, providing a rigorous test of the level of theoretical systematics present in the model. The level of bias in the recovered values of f σ{sub 8} is found to be small. When including scales to k = 0.4 h Mpc{sup −1}, we find 15-30% gains in the statistical precision of f σ{sub 8} relative to k = 0.2 h Mpc{sup −1} and a roughly 10–15% improvement for the perpendicular Alcock-Paczynski parameter α{sub ⊥}. Using the BOSS DR12 CMASS mocks as a benchmark for comparison, we estimate an uncertainty on f σ{sub 8} that is ∼10–20% larger than other similar Fourier-space RSD models in the literature that use k ≤ 0.2 h Mpc{sup −1}, suggesting that these models likely have a too-limited parametrization.

  16. Hot working mechanisms and texture development in Mg-3Sn-2Ca-0.4Al alloy

    Energy Technology Data Exchange (ETDEWEB)

    Dharmendra, C. [Department of Mechanical and Biomedical Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR (China); Rao, K.P., E-mail: mekprao@cityu.edu.hk [Department of Mechanical and Biomedical Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR (China); Prasad, Y.V.R.K. [Processingmaps.com (formerly at City University of Hong Kong) (Hong Kong); Hort, N.; Kainer, K.U. [Helmholtz-Zentrum Geesthacht, Institute of Materials Research, Magnesium Innovation Centre, Max-Planck-Strasse 1, Geesthact 21502 (Germany)

    2012-10-15

    Hot deformation mechanisms in Mg-3Sn-2Ca (TX32) alloy containing 0.4% Al are evaluated in the temperature and strain rate ranges of 300-500 Degree-Sign C and 0.0003-10 s{sup -1} using processing map and kinetic analysis. The evolution of microstructure and texture during high temperature compression of the alloy has been studied using an electron back scatter diffraction (EBSD) technique. The processing map for hot working revealed two domains of dynamic recrystallization (DRX) occurring in the temperature and strain rate ranges of: (1) 300-360 Degree-Sign C and 0.0003-0.001 s{sup -1} and (2) 400-500 Degree-Sign C and 0.005-0.7 s{sup -1}, which are the two safe hot workability windows for this alloy. A regime of flow instability occurs at higher strain rates and lower temperatures where adiabatic shear banding and flow localization are the microstructural manifestations. The onset of DRX during compression at lower temperatures and strain rates (Domain 1) resulted in a fine, partially recrystallized and necklaced grain microstructure along with a texture where the basal poles are spread along 30 Degree-Sign from the compression direction. Specimens deformed at temperatures higher than 450 Degree-Sign C (Domain 2) resulted in a fully recrystallized microstructure and an almost random crystallographic texture, which was attributed to the significant occurrence of pyramidal slip and associated cross-slip. -- Highlights: Black-Right-Pointing-Pointer Processing map revealed two DRX domains for hot working of Mg-3Sn-2Ca-0.4Al alloy. Black-Right-Pointing-Pointer The alloy exhibited flow instability at lower temperatures and higher strain rates. Black-Right-Pointing-Pointer Activation energy values for deformation are high due to the back stress. Black-Right-Pointing-Pointer Basal poles spread around 30 Degree-Sign to the compression axis for Domain 1 peak condition. Black-Right-Pointing-Pointer Texture got randomized at high temperature and strain rate conditions in

  17. Extending the modeling of the anisotropic galaxy power spectrum to k = 0.4 hMpc-1

    Science.gov (United States)

    Hand, Nick; Seljak, Uroš; Beutler, Florian; Vlah, Zvonimir

    2017-10-01

    We present a model for the redshift-space power spectrum of galaxies and demonstrate its accuracy in describing the monopole, quadrupole, and hexadecapole of the galaxy density field down to scales of k = 0.4 hMpc-1. The model describes the clustering of galaxies in the context of a halo model and the clustering of the underlying halos in redshift space using a combination of Eulerian perturbation theory and N-body simulations. The modeling of redshift-space distortions is done using the so-called distribution function approach. The final model has 13 free parameters, and each parameter is physically motivated rather than a nuisance parameter, which allows the use of well-motivated priors. We account for the Finger-of-God effect from centrals and both isolated and non-isolated satellites rather than using a single velocity dispersion to describe the combined effect. We test and validate the accuracy of the model on several sets of high-fidelity N-body simulations, as well as realistic mock catalogs designed to simulate the BOSS DR12 CMASS data set. The suite of simulations covers a range of cosmologies and galaxy bias models, providing a rigorous test of the level of theoretical systematics present in the model. The level of bias in the recovered values of f σ8 is found to be small. When including scales to k = 0.4 hMpc-1, we find 15-30% gains in the statistical precision of f σ8 relative to k = 0.2 hMpc-1 and a roughly 10-15% improvement for the perpendicular Alcock-Paczynski parameter α⊥. Using the BOSS DR12 CMASS mocks as a benchmark for comparison, we estimate an uncertainty on f σ8 that is ~10-20% larger than other similar Fourier-space RSD models in the literature that use k <= 0.2 hMpc-1, suggesting that these models likely have a too-limited parametrization.

  18. Seven-year surveillance of emm types of pediatric Group A streptococcal pharyngitis isolates in Western Greece.

    Directory of Open Access Journals (Sweden)

    George A Syrogiannopoulos

    Full Text Available BACKGROUND: An experimental 26-valent M protein Group A streptococcal (GAS vaccine has entered clinical studies. Pharyngeal GAS emm type surveillances in different areas and time-periods enhance the understanding of the epidemiology of GAS pharyngitis. Moreover, these surveillances, combined with the data on GAS invasive disease, can play a significant role in the formulation of multivalent type-specific vaccines. METHODS: During a 7-year period (1999-2005, 2408 GAS isolates were recovered from consecutive children with pharyngitis in Western Greece. The overall macrolide resistance rate was 22.8%. Along the study period we noted a tendency towards significantly decreased rates of resistance, with the lowest rates occurring in 2002 (15.3%, 2003 (15% and 2004 (16.7%. A random sample of isolates from each year, 338 (61.7% of the 548 macrolide-resistant and 205 (11% of the macrolide-susceptible, underwent molecular analysis, including emm typing. RESULTS: The 543 typed isolates had 28 different emm types. A statistically significant association was found between macrolide resistance and emm4, emm22 and emm77, whereas emm1, emm3, emm6, emm12, emm87 and emm89 were associated with macrolide susceptibility. A significant yearly fluctuation was observed in emm4, emm28 and emm77. The most common macrolide-resistant GAS were emm77 isolates harboring erm(A, either alone or in combination with mef(A, emm4 carrying mef(A, emm28 possessing erm(B, emm75 carrying mef(A, emm12 harboring mef(A and emm22 carrying erm(A. We estimated that 82.8% of the isolates belonged to emm types included in the novel 26-valent M protein vaccine. The vaccine coverage rate was determined mainly by the increased frequency of nonvaccine emm4 isolates. CONCLUSIONS: A limited number of emm types dominated among macrolide-susceptible and macrolide-resistant GAS isolates. We observed seasonal fluctuations, which were significant for emm4, emm28 and emm77. This type of data can serve as

  19. Prevalence of Gingivitis in a Group of 35- to 70-Year-Olds Residing in Puerto Rico.

    Science.gov (United States)

    Elías-Boneta, Augusto R; Encarnación, Angeliz; Rivas-Tumanyan, Sona; Berríos-Ouslán, Beatriz C; García-Godoy, Bayardo; Murillo, Margarita; Diaz-Nicolas, Jomar; Lugo, Ferdinand; Toro, Milagros J

    2017-09-01

    Gingivitis, an inflammation of the gingival tissues, typically progresses to periodontitis. The objective of this study is to estimate the prevalence of gingivitis in 35- to 70-year-olds residing in San Juan, Puerto Rico, and assess the differences in gingivitis distribution between age and gender groups. A cross-sectional epidemiological study was conducted with a sample of patients from a private practice and patients/employees of the Puerto Rico Medical Center. Participants completed a medical history questionnaire and received soft/hard tissue and gingival assessments based on a modified Löe-Silness index. Descriptive statistics were employed to estimate the overall gingivitis prevalence, severity (mild, moderate, severe), and mean gingival index (GI). Bleeding on probing (BOP) prevalence and the mean percentage of BOP sites were calculated by gender and age. Multinomial logistic regression was used to evaluate the associations between age, gender, and severity in 3 categories; multivariate logistic regression was used for having >=40% sites with BOP (vs. having Puerto Rico than in the US.

  20. Biological dosimetry of low doses (0.05 - 0.4 Gy) with micronucleus dicentrics and chromosome fragments

    International Nuclear Information System (INIS)

    Rodriguez, L.; Sanchez, E.; Linares, C.; Navlet, J.

    1997-01-01

    This study was carried out within the framework of the agreement between the National Nuclear Safety Council and the University of Alcala of Hernares and in co-operation with the Radiological Service and the Radiation Protection Unit of the Gregorio Maranon General Hospital of Madrid, where irradiations were performed. Blood samples were taken of 4 individuals irradiated with 6 doses of gamma rays between 0.05 Gy and 0.40 Gy, leaving an aliquot dose of 0 Gy. Cultures of lymphocytes for the study of dicentric chromosomes (DC) and chromosomal fragments (fr), stopping the first mitosis after postirradiation with Colcemid. A study of micronuclei (MN) in binuclear cells was also performed, interrupting the first cytokinesis after postirradiation with citocalasina B. After the corresponding studies with optical microscope, statistical analysis was made on the observed data on DC, fr and MN. We made a multiple linear regression analysis of the data of the 4 individuals. We obtained the average of the 4 individuals for each variable and dose and performed the variance analysis. According to our study, neither the DC nor the MN are valid dosemeters for lower doses up to 0.4 Gy. Nevertheless there are indications that the fragments are correlated with the dose to these levels. By increasing both the points of dose and the number of metaphases studied, we believe that a dose curve can be done that would allow to estimate with a reasonable degree of confidence the dose received by a sample irradiated

  1. Precipitation sequence and kinetics in a Mg-4Sm-1Zn-0.4Zr (wt%) alloy

    Energy Technology Data Exchange (ETDEWEB)

    Xia, Xiangyu, E-mail: xxia5@wisc.edu [Materials Science Program, University of Wisconsin – Madison, 1509 University Ave., Madison, WI 53706 (United States); Department of Materials Science and Engineering, University of Wisconsin – Madison, 1509 University Ave, Madison, WI 53706 (United States); Luo, Alan A. [Department of Materials Science and Engineering, University of Wisconsin – Madison, 1509 University Ave, Madison, WI 53706 (United States); Department of Materials Science and Engineering, The Ohio State University, 116 W. 19th Ave, Columbus, OH 43210 (United States); Stone, Donald S. [Materials Science Program, University of Wisconsin – Madison, 1509 University Ave., Madison, WI 53706 (United States); Department of Materials Science and Engineering, University of Wisconsin – Madison, 1509 University Ave, Madison, WI 53706 (United States)

    2015-11-15

    The present research presents a series of investigations into phase identification and precipitation sequence in Mg-4Sm-1Zn-0.4Zr alloy, using differential scanning calorimetry (DSC), transmission electron microscopy (TEM) and high angle annular dark field scanning transmission electron microscopy (HAADF-STEM). The precipitation sequence is: super saturated solid solution (S.S.S.S) → solute atom clusters → γ″ → γ′ (→stacking faults) → γ. Structure of γ″ has been determined as an ordered hexagonal GP zone, a = 0.556 nm, c = 0.414 nm γ′ is composed of several γ″ layers. Kinetic studies show that quenched-in vacancies play an important role in the formation of solute clusters, while the growth of both precipitates are diffusion controlled. Analysis of microstructure evolution suggests that nucleation of γ′ happens near existing γ″ precipitates. - Highlights: • Precipitation sequence in a high-zinc magnesium-samarium-zinc-zirconium alloy has been identified. • Structures of metastable precipitates are modified directly with HAADF-STEM. • Kinetic calculations were performed to understand nucleation/growth mechanisms of these precipitates.

  2. Heat-treatment, microstructure and mechanical properties of experimental high strength Fe--4Cr--0.4C steels

    International Nuclear Information System (INIS)

    Narasimha Rao, B.V.; Miller, R.W.; Thomas, G.

    1975-12-01

    The treatments involve high temperature (1100 0 C) austenitizing during the first solution treatment followed by either interrupted quenching (Ms-Mf range) or isothermal transformation to produce lower bainite. Finally, the steels are given a 900 0 C grain refinement treatment. Lower bainite was obtained by isothermally transforming austenite just above the Ms temperature. Tempering after the martensitic and bainitic treatments was also done in an attempt to improve the toughness of the material. The strength and toughness properties of as-quenched martensitic structures are somewhat superior while these properties of lower bainitic structures are comparable to those of a plain 0.4C steel. The properties of the nearly 100 percent bainite structure were unaffected by the cooling rate from the transformation temperature. Elimination of intergranular cracking produced toughness properties in quenched and tempered martensites which are far superior to those of lower bainite at the same strength level. It has also been shown that the toughness properties of as-quenched double-treated steels are superior to single treated steels. The chromium appeared to have a strong influence on the nature and morphology of carbides, as the bainitic as well as the martensitic structures showed marked temper resistance in the tempering range 200 to 500 0 C

  3. Substrate-induced strain effects on Pr0.6Ca0.4MnO3 films

    International Nuclear Information System (INIS)

    Nelson, C S; Hill, J P; Gibbs, Doon; Rajeswari, M; Biswas, A; Shinde, S; Greene, R L; Venkatesan, T; Millis, A J; Yokaichiya, F; Giles, C; Casa, D; Venkataraman, C T; Gog, T

    2004-01-01

    We report the characterization of the crystal structure, low-temperature charge and orbital ordering, transport and magnetization of Pr 0.6 Ca 0.4 MnO 3 films grown on LaAlO 3 , NdGaO 3 and SrTiO 3 substrates, which provide compressive (LaAlO 3 ) and tensile (NdGaO 3 and SrTiO 3 ) strain. The films are observed to exhibit different crystallographic symmetries from the bulk material and the low-temperature ordering is found to be more robust under compressive as opposed to tensile strain. In fact, bulk-like charge and orbital ordering is not observed in the film grown on NdGaO 3 , which is the substrate that provides the least amount of measured, but tensile, strain. This result suggests the importance of the role played by the Mn-O--Mn bond angles in the formation of charge and orbital ordering at low temperatures. Finally, in the film grown on LaAlO 3 , a connection between the lattice distortion associated with orbital ordering and the magnetization is reported

  4. Strain driven anisotropic magnetoresistance in antiferromagnetic La0.4Sr0.6MnO3 thin films

    Science.gov (United States)

    Ward, T. Zac; Wong, A. T.; Takamura, Yayoi; Herklotz, Andreas

    2015-03-01

    Antiferromagnets (AFM) are a promising alternative to ferromagnets (FM) in spintronic applications. The reason stems from the fact that at high data storage densities stray fields could destroy FM set states while AFMs would be relatively insensitive to this data corruption. This work presents the first ever example of antiferromagnetic La0.4Sr0.6MnO3 thin films stabilized in different strain states. Strain is found to drive different types of AFM ordering, and these variations in ordering type are shown to have a profound impact on both the magnitude and character of the materials' resistive response to magnetic field direction, or anisotropic magnetoresistance (AMR) behavior (one standard of spintronic suitability). The compressively strained film shows the highest recorded AMR response in an ohmic AFM device of 63%, while the tensile strained film shows a typical AFM AMR of 0.6%. These findings demonstrate the necessity of understanding electron ordering in AFM spintronic applications and provide a new benchmark for AMR response. This work was supported by the U. S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Science and Engineering Division.

  5. Visible and near-infrared (0.4-2.5 μm) reflectance spectra of playa evaporite minerals

    Science.gov (United States)

    Crowley, James K.

    1991-01-01

    Visible and near-infrared (VNIR; 0.4–2.4 μm) reflectance spectra were recorded for 35 saline minerals that represent the wide range of mineral and brine chemical compositions found in playa evaporite settings. The spectra show that many of the saline minerals exhibit diagnostic near-infrared absorption bands, chiefly attributable to vibrations of hydrogen-bonded structural water molecules. VNIR reflectance spectra can be used to detect minor hydrate phases present in mixtures dominated by anhydrous halite or thenardite, and therefore will be useful in combination with X ray diffraction data for characterizing natural saline mineral assemblages. In addition, VNIR reflectance spectra are sensitive to differences in sample hydration state and should facilitate in situ studies of minerals that occur as fragile, transitory dehydration products in natural salt crusts. The use of spectral reflectance measurements in playa studies should aid in mapping evaporite mineral distributions and may provide insight into the geochemical and hydrological controls on playa mineral and brine development.

  6. Strongly enhanced current densities in Sr0.6K0.4Fe2As2 + Sn superconducting tapes

    Science.gov (United States)

    Lin, He; Yao, Chao; Zhang, Xianping; Zhang, Haitao; Wang, Dongliang; Zhang, Qianjun; Ma, Yanwei; Awaji, Satoshi; Watanabe, Kazuo

    2014-03-01

    Improving transport current has been the primary topic for practical application of superconducting wires and tapes. However, the porous nature of powder-in-tube (PIT) processed iron-based tapes is one of the important reasons for low critical current density (Jc) values. In this work, the superconducting core density of ex-situ Sr0.6K0.4Fe2As2 + Sn tapes, prepared from optimized precursors, was significantly improved by employing a simple hot pressing as an alternative route for final sintering. The resulting samples exhibited optimal critical temperature (Tc), sharp resistive transition, small resistivity and high Vickers hardness (Hv) value. Consequently, the transport Jc reached excellent values of 5.1 × 104 A/cm2 in 10 T and 4.3 × 104 A/cm2 in 14 T at 4.2 K, respectively. Our tapes also exhibited high upper critical field Hc2 and almost field-independent Jc. These results clearly demonstrate that PIT pnictide wire conductors are very promising for high-field magnet applications.

  7. Retrospective evaluation of the effects of administration of tetrastarch (hydroxyethyl starch 130/0.4) on plasma creatinine concentration in dogs (2010-2013): 201 dogs.

    Science.gov (United States)

    Yozova, Ivayla D; Howard, Judith; Adamik, Katja-Nicole

    2016-07-01

    To determine changes in creatinine concentrations following the administration of 6% tetrastarch (hydroxyethyl starch [HES] 130/0.4) compared to crystalloids (CRYSs) in critically ill dogs. Retrospective case series (2010-2013). University teaching hospital. Two hundred and one dogs admitted to the intensive care unit with initial plasma creatinine concentrations not exceeding laboratory reference intervals (52-117 μmol/L [0.6-1.3 mg/dL]) and receiving either CRYSs alone (CRYS group, n = 115) or HES with or without CRYSs (HES group, n = 86) for at least 24 hours. None. Creatinine concentrations at admission to the intensive care unit (T0), and 2-13 days (T1) and 2-12 weeks (T2) after initiation of fluid therapy were analyzed. Creatinine concentrations were analyzed as absolute values and as the maximum percentage change from T0 to T1 (T1max%) and from T0 to T2 (T2max%), respectively. Creatinine concentrations were available for 192 dogs during T1 and 37 dogs during T2. The median cumulative dose of HES was 86 mL/kg (range, 12-336 mL/kg). No difference was detected between the groups for age, gender, body weight, and length of hospitalization. Outcome was significantly different between the HES (66% survived) and the CRYS (87% survived) groups (P = 0.014). No significant difference was detected between groups for creatinine concentrations at T0, T1, T2, T1max%, or T2max%. No significant difference was detected between the groups for T1max% creatinine in dogs subclassified as having systemic inflammatory response syndrome or sepsis. HES administration in this canine population did not result in increased creatinine concentrations compared to administration of CRYSs. Further studies are needed to establish the safety of HES in critically ill dogs. © Veterinary Emergency and Critical Care Society 2016.

  8. A randomized prospective analysis of alteration of hemostatic function in patients receiving tranexamic acid and hydroxyethyl starch (130/0.4 undergoing off pump coronary artery bypass surgery

    Directory of Open Access Journals (Sweden)

    Murali Chakravarthy

    2012-01-01

    Full Text Available Postoperative hemorrhagic complications is still one of the major problems in cardiac surgeries. It may be caused by surgical issues, coagulopathy caused by the side effects of the intravenous fluids administered to produce plasma volume expansion such as hydroxyl ethyl starch (HES. In order to thwart this hemorrhagic issue, few agents are available. Fibrinolytic inhibitors like tranexamic acid (TA may be effective modes to promote blood conservation; but the possible complications of thrombosis of coronary artery graft, precludes their generous use in coronary artery bypass graft surgery. The issue is a balance between agents that promote coagulation and those which oppose it. Therefore, in this study we have assessed the effects of concomitant use of HES and TA. Thromboelastogram (TEG was used to assess the effect of the combination of HES and TA. With ethical committee approval and patient′s consent, 100 consecutive patients were recruited for the study. Surgical and anesthetic techniques were standardized. Patients fulfilling our inclusion criteria were randomly allocated into 4 groups of 25 each. The patients in group A received 20 ml/kg of HES (130/0.4, 10 mg/kg of T.A over 30 minutes followed by infusion of 1 mg/kg/hr over the next 12 hrs. The patients in group B received Ringer′s lactate + TA at same dose. The patients in the Group C received 20 ml/kg of HES. Group D patients received RL. Fluid therapy was goal directed. Total blood loss was assessed. Reaction time (r, α angle, maximum amplitude (MA values of TEG were assessed at baseline, 12, 36 hrs. The possible perioperative myocardial infraction (MI was assessed by electrocardiogram (ECG and troponin T values at the baseline, postoperative day 1. Duration on ventilator, length of stay (LOS in the intensive care unit (ICU were also assessed. The demographical profile was similar among the groups. Use of HES increased blood loss significantly (P < 0.05. Concomitant use of TA

  9. Fluvial deposits as an archive of early human activity: Progress during the 20 years of the Fluvial Archives Group

    Science.gov (United States)

    Chauhan, Parth R.; Bridgland, David R.; Moncel, Marie-Hélène; Antoine, Pierre; Bahain, Jean-Jacques; Briant, Rebecca; Cunha, Pedro P.; Despriée, Jackie; Limondin-Lozouet, Nicole; Locht, Jean-Luc; Martins, Antonio A.; Schreve, Danielle C.; Shaw, Andrew D.; Voinchet, Pierre; Westaway, Rob; White, Mark J.; White, Tom S.

    2017-06-01

    Fluvial sedimentary archives are important repositories for Lower and Middle Palaeolithic artefacts throughout the 'Old World', especially in Europe, where the beginning of their study coincided with the realisation that early humans were of great antiquity. Now that many river terrace sequences can be reliably dated and correlated with the globally valid marine isotope record, potentially useful patterns can be recognized in the distribution of the find-spots of the artefacts that constitute the large collections that were assembled during the years of manual gravel extraction. This paper reviews the advances during the past two decades in knowledge of hominin occupation based on artefact occurrences in fluvial contexts, in Europe, Asia and Africa. As such it is an update of a comparable review in 2007, at the end of IGCP Project no. 449, which had instigated the compilation of fluvial records from around the world during 2000-2004, under the auspices of the Fluvial Archives Group. An overarching finding is the confirmation of the well-established view that in Europe there is a demarcation between handaxe making in the west and flake-core industries in the east, although on a wider scale that pattern is undermined by the increased numbers of Lower Palaeolithic bifaces now recognized in East Asia. It is also apparent that, although it seems to have appeared at different places and at different times in the later Lower Palaeolithic, the arrival of Levallois technology as a global phenomenon was similarly timed across the area occupied by Middle Pleistocene hominins, at around 0.3 Ma.

  10. PREVALENCE OF PAEDIATRIC DERMATOSES IN THE AGE GROUP OF 5-14 YEARS AT A TERTIARY CARE CENTER IN SALEM

    Directory of Open Access Journals (Sweden)

    Prasanna Kanniah Baskara

    2017-01-01

    Full Text Available BACKGROUND Skin diseases in pediatric age group are common all over the world. Pediatric dermatoses require separate view from adult dermatoses as there are differences in their clinical presentation and treatment. OBJECTIVE The aim of our study was to determine the prevalence of pediatric dermatoses attending our tertiary care center. MATERIALS AND METHODS This was a cross-sectional study conducted in 100 consecutive children with dermatoses between 5-14 years of age attending dermatology outpatient department at Vinayaka Missions Kirupananda Variyar medical college, Salem. The study was conducted over a period of 6 months from February 2016 to August 2016. Demographic parameters, detailed history, clinical features and diagnosis were recorded and analyzed. RESULTS In our short term study, we examined 100 pediatric cases with 106 dermatoses. The incidence of infections and infestations (43.39% was more prevalent in our study. The most common non-infectious dermatoses in our study was insect bite reactions (17.9%. Dermatitis and eczema (9.39%, disorders of sweat and sebaceous glands (6.6%, pigmentary disorders (5.66%, disorders of hair and nails (3.77%, genetic disorders (2.88%, immune and allergic disorders (2.8%, psoriasis (2.8%, nutritional disorders (0.9%, Polymorphic light eruption (0.9%, pearly penile papule (0.9%, aphthous ulcer (0.9% and pityriasis rosea (0.9% were the other dermatoses seen in the study.CONCLUSION Fungal infections (tinea versicolor and tinea corporis, scabies and insect bite reactions were the common dermatoses observed in our study. Most of the pediatric patients attending our hospital came from rural areas belonging to low socioeconomic strata. Health education, proper sanitation and improved nutrition will help to reduce the incidence of pediatric dermatoses.

  11. On the superconducting state in Ba0.6K0.4BiO3 perovskite oxide

    Science.gov (United States)

    Szcześniak, D.; Kaczmarek, A. Z.; Drzazga, E. A.; Szewczyk, K. A.; Szcześniak, R.

    2018-05-01

    We report study on the superconducting state in Ba0.6K0.4BiO3 (BKBO) perovskite oxide, motivated by the inconclusive results on the pairing mechanism in this compound. Our investigations are conducted within the Migdal-Eliashberg formalism, to account for the phonon-mediated superconducting phase. The considered doping level of the discussed material corresponds to the highest critical temperature in this compound, and allows simultaneous analysis of the oxygen isotope effect, for the O16 and O18 isotopes, respectively. We found that such effect is particularly visible for the critical values of the Coulomb pseudopotential (μC⋆) , which equals to 0.18 for the O16 and 0.16 for the O18 isotope in BKBO. Moreover, we determine the size of the superconducting energy band gap (Δg) and note that obtained values (9.68 meV and 9.55 meV for the O16 and O18, respectively) are in good agreement with the experimental predictions which give Δg ∼ 8.68 meV . Finally, we calculate the characteristic dimensionless parameters, such as the zero-temperature energy gap to the critical temperature, the ratio for the specific heat, as well as the ratio associated with the zero-temperature thermodynamic critical field, which suggest occurrence of the strong-coupling and retardation effects within the phonon-mediated scenario in the analyzed material. Where possible the dimensionless ratios are compared to the experimental estimates, and agrees with these which account for the strong-coupling character of the BKBO superconductor.

  12. The '0.4 eV' shape resonance of electron scattering from mercury in a Franck-Hertz tube

    International Nuclear Information System (INIS)

    Nicoletopoulos, Peter

    2004-01-01

    The alternative version of the Franck-Hertz experiment with mercury, in which a two-grid tube is used as a combination of electron gun, equipotential collision space and detection cell, was analysed recently in considerable detail. In particular, it was inferred that, at optimal pressure, the formation of peaks in the anode current at inelastic thresholds is mediated inside the detection cell by the large variation, a maximum at 0.4 eV, in the cross section for elastic scattering. This variation is due to a shape resonance in the electron-mercury system and is observable persuasively at the onset of anode current as a sharp peak followed by a clear minimum. In this paper, the passage of electrons through the second grid to the anode region is analysed in terms of kinetic theory. The discussion is based on a simplified expression for the electron current derivable from an approximate form of the Boltzmann transport equation that maintains the spatial density gradient but omits elastic energy losses. The estimated range of pressure underlying this kind of idealization is in good agreement with experiment. An explicit solution is obtained by constructing an analytic expression for the momentum transfer cross section of mercury using a recent theory of generalized Fano profiles for overlapping resonances. This solution is used in order to model successfully the formation of peaks at the threshold of anode current and at excitation potentials, and to explain the dependence of the observed profiles on the pressure and on the sign and magnitude of the potential across the detection cell

  13. Synthesis and dielectric characterization of Ba0.6Sr0.4TiO3 ferroelectric ceramics

    International Nuclear Information System (INIS)

    Nedelcu, L.; Ioachim, A.; Toacsan, M.; Banciu, M.G.; Pasuk, I.; Berbecaru, C.; Alexandru, H.V.

    2011-01-01

    Ferroelectric ceramics Ba 0.6 Sr 0.4 TiO 3 (BST 40) were prepared, by solid-state reaction in the temperature range 1210-1450 deg. C. Maximum values of the ceramic densities were around 94% of their theoretical value. X-ray diffraction techniques (XRD) and scanning electron spectroscopy (SEM) were used to analyze the structure and the surface morphology of ceramics. Rounded, well defined or abnormal granular growth was observed in the SEM images, vs. sintering conditions and purity of the raw materials. In all samples, BST 40 ceramic is the major phase, but there are also present small amounts of secondary phases, as revealed in XRD diffraction patterns. Permittivity and dielectric loss measurements were performed in the temperature range - 150 to + 150 deg. C, and 150 Hz-5 MHz frequency values. Permittivity values rising from 1200 to 12,500, with increasing sintering temperatures, were recorded. Narrow and well defined transition peaks were noticed at higher sintering temperatures. Curie temperature was around 2 deg. C, for samples with the mentioned composition. Permittivity and losses vs. frequency show different behavior whether BST ceramics are in polar or non-polar state and with the distance toward phase transition. Microwave measurements performed at room temperature have shown lower values of permittivity, compared with similar data at low frequency, and dielectric losses lower than 1% at 0.7 GHz. The sintering conditions (temperatures, sintering time, etc.) and purity of the raw materials lead to important changes of transition temperatures in the polymorphic diagram, which we have built-for the other Ba1-xSrxTiO3 compositions (x = 0.25-0.90) sintered at 1260 deg. C for 2 h.

  14. Weight Loss Maintenance for 2 Years after a 6-Month Randomised Controlled Trial Comparing Education-Only and Group-Based Support in Japanese Adults

    Directory of Open Access Journals (Sweden)

    Yoshio Nakata

    2014-11-01

    Full Text Available Objective: Our previous study, a 6-month randomised controlled trial, demonstrated that a group-based support promoted weight loss as compared to an education-only intervention. The purpose of this study was to examine weight loss maintenance for 2 years. Methods: Originally, 188 overweight Japanese adults, aged 40-65 years, were randomly assigned to 3 groups: control, education-only or group-based support. After the 6-month intervention, 125 participants in the education-only and the group-based support groups were followed up for 2 years. The primary outcome was the amount of weight lost. The participants were retrospectively grouped into quartiles of percent weight loss for secondary analyses. Results: At the end of follow-up, the amount of weight lost in the education-only and the group-based support groups was the same (3.3 kg. Secondary analyses using data of those who completed the study (n = 100 revealed that the participants in the highest quartile of percent weight loss significantly increased their step counts and moderate-to-vigorous physical activity compared with the lowest quartile. No significant differences were observed in the energy intake among the four groups. Conclusion: The effects of group-based support disappear within 2 years. Increasing physical activity may be a crucial factor for successful maintenance of weight loss.

  15. Comparative study of personality disorder associated with deliberate self harm in two different age groups (15?24 years and 45?74 years)

    OpenAIRE

    Nath, Saswati; Patra, Dipak Kumar; Biswas, Srilekha; Mallick, Asim Kumar; Bandyopadhyay, Gautam Kumar; Ghosh, Srijit

    2008-01-01

    Aims: To study the presence of personality disorder in cases of deliberate self harm (DSH) in young (15?24 years) and elderly (45?74 years) and compare. Materials and Methods: Deliberate self harm cases admitted in Medical and surgical departments and cases attending psychiatry department of R.G. Kar Medical College, Kolkata were studied. For diagnosis of personality disorder ICD 10 International Personality Disorder Examination (IPDE) questionnaire was used. Results: Percentage of elderly pa...

  16. Systemic lupus erythematosus in three ethnic groups. VI: Factors associated with fatigue within 5 years of criteria diagnosis. LUMINA Study Group. LUpus in MInority populations: NAture vs Nurture.

    Science.gov (United States)

    Zonana-Nacach, A; Roseman, J M; McGwin, G; Friedman, A W; Baethge, B A; Reveille, J D; Alarcón, G S

    2000-01-01

    To determine the frequency, degree and associated features of fatigue among Hispanic (H), African American (AA) and Caucasian (C) patients with recent onset (NAture vs Nurture) cohort were studied. Fatigue [Fatigue Severity Scale (FSS)] was defined as present if FSS score > or = 3.0. Variables from functional, clinical, sociodemographic, health behaviors, behavioral and psychological and immunogenetics domains were ascertained at study entry. Associations were examined using regression models. Eighty-six percent (85.7%) of patients reported having fatigue (82.6% H; 85.5% AA; 88.7% C); median FSS score, 5.3. Factors from the psychological and clinical domains were primarily associated with FSS; immunogenetic (HLA Class II phenotypes) features were not. Increased fatigue was strongly associated with decreasing function, both physical and mental. Variables associated with significantly greater degree of fatigue at baseline in the multivariable stepwise model in order of decreasing additional partial R2 explained included: abnormal illness-related behaviors, older age, higher self-reported pain, greater degree of helplessness, greater disease activity, Caucasian race, and lacking health insurance (model R2 = 37%). Fatigue is one of the most prevalent clinical manifestations of SLE across all ethnic groups. The perception of fatigue severity in SLE may be multifactorial in origin, including psychosocial factors and disease activity. If these prove causal, knowledge of their contribution may suggest therapeutic and/or behavioral interventions, which could ameliorate this pervasive and often incapacitating symptom of SLE.

  17. The devil is in the details: retention of recipient group A type 5 years after a successful allogeneic bone marrow transplant from a group O donor.

    Science.gov (United States)

    Cooling, Laura L W; Herrst, Michelle; Hugan, Sherri L

    2018-01-01

    ABO-incompatible (ABOi) hematopoietic stem cell transplants (HSCTs) can present challenges in the blood bank. During transplantation, patients receive components that are ABO-compatible with both the donor graft and recipient; this practice can strain group O red blood cell (RBC) inventories.1 In addition, there are risks for acute hemolysis at the time of infusion and in the early post-transplant period.1,2 In ABO major-incompatible bone marrow HSCTs, which contain significant quantities of donor RBCs that are ABOi with recipient plasma, it is common to perform a RBC depletion of the bone marrow in an effort to minimize hemolysis at the time of infusion.2 Furthermore, patients with high-titer ABO antibodies may undergo a prophylactic, pre-transplant plasma exchange to further reduce the risk of acute hemolysis, delayed RBC engraftment, and pure RBC aplasia.2-4 ABO minor-incompatible HSCTs, in which donor plasma is ABOi with the recipient, have less risk for hemolysis at the time of infusion but can result in transient hemolysis approximately 10-21 days post-transplant, especially in patients undergoing nonmyeloablative HSCT and/or patients who have not received methotrexate for graft-versus-host-disease (GVHD) prophylaxis.1-4 In these patients, viable donor B-lymphocytes in the graft may expand and produce ABO antibodies capable of hemolyzing patient RBCs.

  18. Review of the President's Fiscal Year 2009 Budget Request for the Defense Health Program's Private Sector Care Budget Activity Group

    National Research Council Canada - National Science Library

    Fantone, Denise M; Pickup, Sharon

    2008-01-01

    The Conference Report accompanying the Fiscal Year 2008 Department of Defense Appropriations bill directed us to review the President's fiscal year 2009 budget request for the Defense Health Program's...

  19. A review of the activities of the IAG working group on geomorphosites over the last ten years

    Science.gov (United States)

    Reynard, Emmanuel; Coratza, Paola

    2013-04-01

    During the last two decades a renewed interest emerged in the scientific community for geoheritage, geoconservation and geotourism research. This was the reason for the International Association of Geomorphologists (IAG) for creating a specific working group on geomorphosites in 2001, with the aim to improve knowledge and scientific research on the definition, assessment, cartography, promotion and conservation of geomorphological heritage. The working group is chaired by the two authors, experiences were shared during several workshops and international conferences, and results were collected in several special publications (http://www.geomorph.org/wg/wggs.html). Several intensive courses for Master and PhD students were also organized and a book was published, dedicated particularly to Master and PhD students working on geomorphosite issues (Reynard et al., 2009). This contribution proposes a review of the working group activities since 2001 that focused on four main domains: (1) Definition and conceptualization. Geomorphosites are a type of geosite that is portions of the geosphere that present a particular importance for the comprehension of the Earth's history. Geomorphosites have to be considered as the result of human valuation. Conceptualization related to the value of geomorphosites is still in course. Nevertheless, three groups of values can be demonstrated: the scientific value (that is the interest of sites for Earth history and for the history and epistemology of geomorphology), several additional values (aesthetic, ecological, and cultural in a broad sense), and use and management values, that can be divided in three groups (educational value, economic value, including the tourist value, and protection). The scientific and additional value can be considered as intrinsic values, whereas the management and use value are to be related to extrinsic or societal values. (2) Assessment. Several methods, based on the measurement of specific features of

  20. Nanosized LaCo0.6Fe0.4O3 perovskites synthesized by citrate sol gel auto combustion method

    Directory of Open Access Journals (Sweden)

    Unikoth Megha

    2014-06-01

    Full Text Available LaCo0.6 Fe0.4 O3 (LCFO nanopowder was synthesized from constituent metal nitrates, citric acid and ethylene glycol by citrate sol gel autocombustion method and calcined at different temperatures. The powders were characterized by X-ray diffraction (XRD, scanning electron microscopy (SEM, energy dispersive X-ray analysis (EDAX and Fourier transform infrared spectra (FTIR, whereas dielectric properties were investigated with LCR-meter. The FTIR spectra, taken for the xerogel and the sample calcined at 1000 °C, confirm that the organic groups were removed during calcination and oxide structure was formed. The XRD result shows that LCFO has rhombhohedral crystal structure with R-3C space group and forms single phase after calcination at 600 °C. The activation energy of crystallite growth, determined from the Arrhenius plot, was 17±2 kJ/mol. Surface feature studies of the powders were obtained from SEM. At 1000 °C, dense microstructure with well-shaped grain boundaries was obtained and the average grain size was around 400 nm. EDAX confirms the elemental composition. Finally, from the dielectric studies, it was found that the dielectric constant (εr as well as dielectric loss tangent (tan δ decreases with increase in frequency.

  1. Prostaglandin E2 Levels of Aqueous and Vitreous Humor in Ketorolac 0.4% and Nepafenac 0.1% Administered Healthy Rabbits.

    Science.gov (United States)

    Acar, Ugur; Acar, Damla Erginturk; Tanriverdi, Cafer; Acar, Mutlu; Ozdemir, Ozdemir; Erikci, Acelya; Ornek, Firdevs

    2017-06-01

    To compare the lowering effects of ketorolac 0.4% and nepafenac 0.1% on aqueous and vitreous humor prostaglandin E 2 (PGE 2 ) levels in rabbits. Ketorolac and nepafenac ophthalmic solutions were administered to the right eyes of 24 healthy rabbits after randomized division into two groups. The left eyes of these rabbits were considered as controls for the two groups. On the 4th day of the experiment, the samples were taken from the aqueous and vitreous humors of the rabbits bilaterally, and PGE 2 levels were measured by an enzyme immune assay kit. Ketorolac and nepafenac achieved a statistically significant decrease (phumor (6.58 ± 4.62 and 9.83 ± 4.55 pg/mL, respectively). Both ketorolac and nepafenac inhibited PGE 2 levels in both the aqueous and vitreous humors of rabbits. Although PGE 2 -lowering effects were similar in the aqueous humor, nepafenac seemed to be more potent than ketorolac in the vitreous humor.

  2. Structure and substructure analysis of DAFT/FADA galaxy clusters in the [0.4-0.9] redshift range

    Science.gov (United States)

    Guennou, L.; Adami, C.; Durret, F.; Lima Neto, G. B.; Ulmer, M. P.; Clowe, D.; LeBrun, V.; Martinet, N.; Allam, S.; Annis, J.; Basa, S.; Benoist, C.; Biviano, A.; Cappi, A.; Cypriano, E. S.; Gavazzi, R.; Halliday, C.; Ilbert, O.; Jullo, E.; Just, D.; Limousin, M.; Márquez, I.; Mazure, A.; Murphy, K. J.; Plana, H.; Rostagni, F.; Russeil, D.; Schirmer, M.; Slezak, E.; Tucker, D.; Zaritsky, D.; Ziegler, B.

    2014-01-01

    Context. The DAFT/FADA survey is based on the study of ~90 rich (masses found in the literature >2 × 1014 M⊙) and moderately distant clusters (redshifts 0.4 DAFT/FADA survey for which XMM-Newton and/or a sufficient number of galaxy redshifts in the cluster range are available, with the aim of detecting substructures and evidence for merging events. These properties are discussed in the framework of standard cold dark matter (ΛCDM) cosmology. Methods: In X-rays, we analysed the XMM-Newton data available, fit a β-model, and subtracted it to identify residuals. We used Chandra data, when available, to identify point sources. In the optical, we applied a Serna & Gerbal (SG) analysis to clusters with at least 15 spectroscopic galaxy redshifts available in the cluster range. We discuss the substructure detection efficiencies of both methods. Results: XMM-Newton data were available for 32 clusters, for which we derive the X-ray luminosity and a global X-ray temperature for 25 of them. For 23 clusters we were able to fit the X-ray emissivity with a β-model and subtract it to detect substructures in the X-ray gas. A dynamical analysis based on the SG method was applied to the clusters having at least 15 spectroscopic galaxy redshifts in the cluster range: 18 X-ray clusters and 11 clusters with no X-ray data. The choice of a minimum number of 15 redshifts implies that only major substructures will be detected. Ten substructures were detected both in X-rays and by the SG method. Most of the substructures detected both in X-rays and with the SG method are probably at their first cluster pericentre approach and are relatively recent infalls. We also find hints of a decreasing X-ray gas density profile core radius with redshift. Conclusions: The percentage of mass included in substructures was found to be roughly constant with redshift values of 5-15%, in agreement both with the general CDM framework and with the results of numerical simulations. Galaxies in substructures

  3. Magnetic tunneling junctions with the Heusler compound Co2Cr0.6Fe0.4Al

    International Nuclear Information System (INIS)

    Conca Parra, A.

    2007-01-01

    Materials with large spin polarization are required for applications in spintronics devices. For this reason, major research efforts are directed to study the properties of compounds which are expected to be half metals, i.e. materials with 100% spin polarization. Half metals are expected to have a gap in the density of states at the Fermi energy for one spin band while the other spin band is metallic leading to a completely spin polarized current. The ferromagnetic full Heusler alloy Co 2 Cr 0.6 Fe 0.4 Al (CCFA) has attracted great interest in the field of spintronics. The high Tc (800 K) and the expected half metallicity make CCFA a good candidate for applications in spintronic devices such as magnetic tunneling junctions (MTJs). This thesis presents the results of the study of the electronic and structural properties of CCFA thin films. The films were implemented in magnetic tunneling junctions and the tunneling magnetoresistance effect (TMR) was investigated. The main objectives were the measurement of the spin polarisation of the CCFA alloy and to obtain information about its electronic structure. The influence of the deposition conditions on the thin film properties and on the surface crystalline order and their respective influence on the TMR ratio was investigated. Epitaxial CCFA thin films with two alternative growth orientations were deposited on different substrates and buffer layers. An annealing step was used to improve the crystalline properties of the thin films. In the tunneling junctions, Al 2 O 3 was used as a barrier material and Co was chosen as counter electrode. The multilayer systems were patterned in Mesa structures using lithographic techniques. In the framework of the Julliere model, a maximum spin polarisation of 54% at 4K was measured in tunneling junctions with epitaxial CCFA electrodes. A strong influence of the annealing temperature on the TMR ratio was determined. The increase of the TMR ratio could be correlated to an improvement of

  4. On the evolution of the star formation rate function of massive galaxies: constraints at 0.4 MUSIC catalogue

    Science.gov (United States)

    Fontanot, Fabio; Cristiani, Stefano; Santini, Paola; Fontana, Adriano; Grazian, Andrea; Somerville, Rachel S.

    2012-03-01

    We study the evolution of the star formation rate function (SFRF) of massive (M★ > 1010 M⊙) galaxies over the 0.4 MUSIC) catalogue, which provides a suitable coverage of the spectral region from 0.3 to 24 ?m and either spectroscopic or photometric redshifts for each object. Individual SFRs have been obtained by combining ultraviolet and 24-?m observations, when the latter were available. For all other sources a 'spectral energy distribution (SED) fitting' SFR estimate has been considered. We then define a stellar mass limited sample, complete in the M★ > 1010 M⊙ range and determine the SFRF using the 1/Vmax algorithm. We thus define simulated galaxy catalogues based on the predictions of three different state-of-the-art semi-analytical models (SAMs) of galaxy formation and evolution, and compare them with the observed SFRF. We show that the theoretical SFRFs are well described by a double power law functional form and its redshift evolution is approximated with high accuracy by a pure evolution of the typical SFR (SFR★). We find good agreement between model predictions and the high-SFR end of the SFRF, when the observational errors on the SFR are taken into account. However, the observational SFRF is characterized by a double-peaked structure, which is absent in its theoretical counterparts. At z > 1.0 the observed SFRF shows a relevant density evolution, which is not reproduced by SAMs, due to the well-known overprediction of intermediate-mass galaxies at z˜ 2. SAMs are thus able to reproduce the most intense SFR events observed in the GOODS-MUSIC sample and their redshift distribution. At the same time, the agreement at the low-SFR end is poor: all models overpredict the space density of SFR ˜ 1 M⊙ yr-1 and no model reproduces the double-peaked shape of the observational SFRF. If confirmed by deeper infrared observations, this discrepancy will provide a key constraint on theoretical modelling of star formation and stellar feedback.

  5. Baseline fatty acids, food groups, a diet score and 50-year all-cause mortality rates. An ecological analysis of the Seven Countries Study

    NARCIS (Netherlands)

    Menotti, Alessandro; Kromhout, Daan; Puddu, Paolo Emilio; Alberti-Fidanza, Adalberta; Hollman, Peter; Kafatos, Anthony; Tolonen, Hanna; Adachi, Hisashi; Jacobs, David R.

    2017-01-01

    Objectives: This analysis deals with the ecologic relationships of dietary fatty acids, food groups and the Mediterranean Adequacy Index (MAI, derived from 15 food groups) with 50-year all-cause mortality rates in 16 cohorts of the Seven Countries Study. Material and methods: A dietary survey was

  6. A 10-year follow-up study of completers versus dropouts following treatment with an integrated cognitive-behavioral group therapy for eating disorders.

    Science.gov (United States)

    Okamoto, Yuri; Miyake, Yoshie; Nagasawa, Ichie; Shishida, Kazuhiro

    2017-01-01

    Cognitive-behavioral therapy (CBT) has been recommended for the treatment of eating disorders, and group therapy is known to have certain advantages over individual therapy. The aim of the current study was to compare the 10-year prognosis of patients who completed integrated group CBT with those who dropped out and to examine the effect of completion of group CBT on the prognosis. The participants were 65 adult patients with eating disorders. All patients were women and Japanese. The average age (19-37) of the patients was 25.1 ± 3.8 years, and the average body mass index (BMI) was 17.7 ± 2.0. We conducted integrated group CBT with the patients and compared eating disorder symptoms, mood states, coping styles, and self-esteem before and after therapy. Furthermore, we compared clinical features and the 10-year prognosis of patients who completed the treatment and those who dropped out. After 10 sessions of group therapy, Eating Attitudes Test scores, Profile of Mood States depression scores, and Coping Inventory for Stressful Situations emotion-oriented scores decreased, while Rosenberg's Self-Esteem Scale scores increased. Regarding the results of the 10-year follow up, the completer group had more patients with a good prognosis. In contrast, the dropout group had more patients with a poor prognosis. Those who completed the integrated group CBT had a good prognosis. Group therapy gives the patients an opportunity to form peer relationships, and helps them to develop communication and socialization skills. Furthermore, in the group therapy sessions, the patients develop self-awareness by listening to other members of the group and they also develop interpersonal relationships. This effect may be temporary, but experience of group therapy may provide hope for the patient and increase the chance of the patient continuing treatment. Retrospectively registered in University Hospital Medical Information Network in Japan: No. 000028868 (May 19th, 2017).

  7. Punishment and reward in parental discipline for children aged 5 to 6 years : prevalence and groups at risk

    NARCIS (Netherlands)

    Theunissen, Meinou H. C.; Vogels, Anton G. C.; Reijneveld, Sijmen A.

    2014-01-01

    OBJECTIVE: In this study we examined the use and predictors of different discipline practices by parents of children aged 5 to 6 years. METHODS: We obtained cross-sectional data for a nationally representative Dutch sample of children aged 5 to 6 years within the setting of routine well-child visits

  8. Seasonal variation in cause-specific mortality: are there high-risk groups? 25-year follow-up of civil servants from the first Whitehall study

    NARCIS (Netherlands)

    C.T.M. van Rossum (Caroline); M.J. Shipley; H. Hemingway; D.E. Grobbee (Diederick); J.P. Mackenbach (Johan); M.G. Marmot

    2001-01-01

    textabstractOBJECTIVES: To determine the seasonal effect on all-cause and cause-specific mortality and to identify high-risk groups. METHODS: A 25-year follow-up of 19,019 male civil servants aged 40-69 years. RESULTS: All-cause mortality was seasonal (ratio of highest mortality

  9. Studies of the effect of 0.4-Gy and 0.6-Gy prenatal X-irradiation on postnatal adult behavior in the Wistar rat.

    Science.gov (United States)

    Jensh, R P; Brent, R L; Vogel, W H

    1987-02-01

    Thirty-four pregnant Wistar rats were X-irradiated on the 9th or 17th day of gestation at a dosage level 0.4 Gy or 0.6 Gy or were sham-irradiated. All mothers were allowed to deliver their offspring, and litters were limited to a maximum of eight on day 2. On day 30, 224 offspring were weaned and raised until 60 days of age, at which time testing began. Each rat randomly received, in random order, three of the following six behavioral tests: Water T-maze, Conditioned Avoidance Response, Forelimb Hanging, Activity Wheel, Swimming, and Open Field. There were no statistically significant differences between the irradiated and control groups for maternal weight or weight gain or mean litter size, although the litter size of the 17th day 0.6-Gy group was slightly lower. Among offspring irradiated with 0.6 Gy on the 17th day, 3-day-old neonates' weights were significantly reduced. Offspring irradiated on the 17th day with 0.6 Gy exhibited higher Conditioned Avoidance Response 5th-day and retest avoidance scores than did the controls. There were also significant sex differences in responses within the irradiated and control groups for several tests, which were unrelated to radiation exposure. The results of this study indicate that low-level X-irradiation during the fetal period of rat gestation results in neonatal growth retardation and subtle behavioral alterations that may be manifested in adult life. Growth retardation may be the most sensitive indicator of subtle effects that result from low-level prenatal exposure to X-rays.

  10. Studies of the effect of 0.4-Gy and 0.6-Gy prenatal X-irradiation on postnatal adult behavior in the Wistar rat

    International Nuclear Information System (INIS)

    Jensh, R.P.; Brent, R.L.; Vogel, W.H.

    1987-01-01

    Thirty-four pregnant Wistar rats were X-irradiated on the 9th or 17th day of gestation at a dosage level 0.4 Gy or 0.6 Gy or were sham-irradiated. All mothers were allowed to deliver their offspring, and litters were limited to a maximum of eight on day 2. On day 30, 224 offspring were weaned and raised until 60 days of age, at which time testing began. Each rat randomly received, in random order, three of the following six behavioral tests: Water T-maze, Conditioned Avoidance Response, Forelimb Hanging, Activity Wheel, Swimming, and Open Field. There were no statistically significant differences between the irradiated and control groups for maternal weight or weight gain or mean litter size, although the litter size of the 17th day 0.6-Gy group was slightly lower. Among offspring irradiated with 0.6 Gy on the 17th day, 3-day-old neonates' weights were significantly reduced. Offspring irradiated on the 17th day with 0.6 Gy exhibited higher Conditioned Avoidance Response 5th-day and retest avoidance scores than did the controls. There were also significant sex differences in responses within the irradiated and control groups for several tests, which were unrelated to radiation exposure. The results of this study indicate that low-level X-irradiation during the fetal period of rat gestation results in neonatal growth retardation and subtle behavioral alterations that may be manifested in adult life. Growth retardation may be the most sensitive indicator of subtle effects that result from low-level prenatal exposure to X-rays

  11. Prevalence and impact of primary headache disorders among students and working population in 18-25 years age group

    Directory of Open Access Journals (Sweden)

    Gowri Aishwarya S, Eswari N, Chandrasekar M, Chandra Prabha J

    2014-04-01

    Full Text Available Background: Headache or cephalalgia is defined as pain in the head. Headache is an extremely common symptom that may have a profound impact on peoples’ functioning and quality of life. According to International Classification of Headache Disorders (ICHD, they are Primary and Secondary headaches. Primary Headaches are triggered by stress, alcohol, changes in sleep pattern, anxiety, poor posture, all of which are part and parcel our day-to-day life. The study was performed to investigate the prevalence of primary headache disorders and its severity of impact among students and working population in the age group 18-25. Methods: The study was conducted on 718 subjects of which 483 subjects were medical and engineering students from the age group 18-21 and 235 subjects were working people from the age group 22-25. Written consent was taken from each of them. Headache Impact Test-6 (version 1.1 and the HARDSHIP Questionnaire by Timothy Steiner et al. were the questionnaires used to diagnose the severity of impact and the type of headache respectively. The study was ethically approved by Ethical Clearance Board of MAHER University. People suffering from psychiatric illness were excluded from the study. Result: There was increased prevalence of migraine in the age group 18-21 and tension type headache in the age group 22-25.Over 50%of subjects from both the age groups had headaches that have substantial to severe impact on their lives. There was no significant gender variation in headache prevalence.

  12. MAX phase formation by intercalation upon annealing of TiCx/Al (0.4 ≤ x ≤ 1) bilayer thin films

    International Nuclear Information System (INIS)

    Abdulkadhim, Ahmed; Takahashi, Tetsuya; Music, Denis; Munnik, Frans; Schneider, Jochen M.

    2011-01-01

    TiC x /Al bilayer thin films were synthesized using combinatorial magnetron sputtering to study the influence of C content on the reaction products at different annealing temperatures. Based on energy-dispersive X-ray analysis calibrated by elastic recoil detection analysis data, x in TiC x was varied from 0.4 to 1.0. Film constitution was studied by X-ray diffraction before and after annealing at temperatures from 500 to 1000 deg. C. The formation of TiC x and Al in the as-deposited samples over the whole C/Ti range was identified. Upon annealing, TiC x reacts with Al to form Ti-Al-based intermetallics. At temperatures as low as 700 deg. C, the formation of MAX phases (space group P6 3 /mmc) is observed at x ≤ 0.7. Based on the comparison between the C content induced changes in the lattice spacing of TiC x and Ti 2 AlC as well as Ti 3 AlC 2 , we infer the direct formation of MAX phases by Al intercalation into TiC x for x ≤ 0.7.

  13. Reducing the concentration to 0.4% enantiomeric excess hyperbaric levobupivacaine (s75: r25) provides unilateral spinal anesthesia. Study with different volumes.

    Science.gov (United States)

    Imbelloni, Luiz Eduardo; Gouveia, Marildo A; Carneiro, Antonio Fernando; Grigorio, Renata

    2012-01-01

    Unilateral spinal anesthesia may be obtained with hypobaric or hyperbaric solution. The objective of this study was to compare different doses of enantiomeric excess hyperbaric levobupivacaine to achieve unilateral spinal anesthesia. One hundred and twenty patients were randomized to receive 4 mg, 6 mg or 8 mg of 0.4% enantiomeric excess levobupivacaine. The solutions were administered at the L3-L4, with the patient in a lateral position and kept at this position according to dose administration for 5, 10 or 15 minutes. Sensory block (pinprick) and motor block (scale 0-3) were compared between the operated and contralateral sides. The onset of analgesia was rapid and comparable between groups. Sensory block was significantly higher in the operated than in nonoperated limb at all times of evaluation. Increasing the dose by 1 mL (2mg) corresponded to an increase of two segments in the mode for the operated side. In the operated side, motor block (MB = 3) of patients occurred in 31 (77.5%) with 4 mg, 38 (95%) with 6 mg, and 40 (100%) with 8 mg. There was a positive correlation between increased dose, blockade duration, and hypotension. All patients were satisfied with the technique used. Spinal anesthesia with different volumes of enantiomeric excess hyperbaric bupivacaine (S75: R25) provided a 78% incidence of unilateral spinal block, with the smallest dose used (4 mg) the most efficient. Copyright © 2012 Elsevier Editora Ltda. All rights reserved.

  14. Synthesis, structural and electrical characterizations of LaSrCu0.4Al0.6O4−δ

    Directory of Open Access Journals (Sweden)

    B. Negri

    2017-10-01

    Full Text Available Abstract A new compound LaSrCu0.4Al0.6O4−δ has been prepared by sol gel method, annealed at 1623 K in oxygen gas flow and examined by X-ray diffraction. Rietveld refinement shows that the sample adopts the K2NiF4-type structure, space group I4/mmm (a = 3.7694(2 and c = 12.8248(5 Ǻ, Z = 2. Vibrational properties were investigated using Raman scattering and the most characteristic vibrations are discussed with reference to the available structural data. Differential thermal analysis shows two endothermic effects at 329 and 593 K and one exothermic at 693 K. Dielectric study as a function of temperature in the frequency range of 1 kHz–1 MHz has confirmed the observed phase transitions. The value of the measured dielectric constant depends on the frequency and undergoes a large increase near the phase transition temperatures indicating a diffuse behavior of these transitions. Variation of conductivity as a function of temperature shows that the compound has a semiconducting behavior. Oxygen vacancies could be the possible ionic charge carriers. The electrical transport mechanism agrees with Adiabatic Small Polaron Hopping model.

  15. MAX phase formation by intercalation upon annealing of TiC{sub x}/Al (0.4 {<=} x {<=} 1) bilayer thin films

    Energy Technology Data Exchange (ETDEWEB)

    Abdulkadhim, Ahmed; Takahashi, Tetsuya [Materials Chemistry, RWTH Aachen University, Kopernikusstrasse 10, 52074 Aachen (Germany); Music, Denis, E-mail: music@mch.rwth-aachen.de [Materials Chemistry, RWTH Aachen University, Kopernikusstrasse 10, 52074 Aachen (Germany); Munnik, Frans [Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, 01328 Dresden (Germany); Schneider, Jochen M. [Materials Chemistry, RWTH Aachen University, Kopernikusstrasse 10, 52074 Aachen (Germany)

    2011-09-15

    TiC{sub x}/Al bilayer thin films were synthesized using combinatorial magnetron sputtering to study the influence of C content on the reaction products at different annealing temperatures. Based on energy-dispersive X-ray analysis calibrated by elastic recoil detection analysis data, x in TiC{sub x} was varied from 0.4 to 1.0. Film constitution was studied by X-ray diffraction before and after annealing at temperatures from 500 to 1000 deg. C. The formation of TiC{sub x} and Al in the as-deposited samples over the whole C/Ti range was identified. Upon annealing, TiC{sub x} reacts with Al to form Ti-Al-based intermetallics. At temperatures as low as 700 deg. C, the formation of MAX phases (space group P6{sub 3}/mmc) is observed at x {<=} 0.7. Based on the comparison between the C content induced changes in the lattice spacing of TiC{sub x} and Ti{sub 2}AlC as well as Ti{sub 3}AlC{sub 2}, we infer the direct formation of MAX phases by Al intercalation into TiC{sub x} for x {<=} 0.7.

  16. Cytogenetic studies for a group of people living in Japan 1 year after the Fukushima nuclear accident

    International Nuclear Information System (INIS)

    Chen, Ying; Zhou, Ping-kun; Zhang, Xue-qing; Wang, Zhi-dong; Wang, Yuan; Darroudi, Firouz

    2014-01-01

    In order to understand the potential health effect of radiation from Fukushima nuclear disaster, a group of people living in Japan during and after the accident were investigated 1 y after the accident. The venous blood samples were extracted in tune from 156 tested persons living in Tokyo and Niigata with average age of 42.4±10.2 y old as well as 87 controls living in Beijing with similar age and sex proportion. Conventional chromosome culture and cytochalasin B micronucleus methods were applied. The unstable chromosome aberrations of 200 cells and micronuclei (MN) and micronuclei cells (MNC) of 1000 bi-nucleated lymphocytes were analysed for each examined subject. The results showed that the frequencies±SE (x100) of the dicentrics plus rings were 0.17±0.024 % and 0.13±0.028 % in the tested and control populations (p > 0.05), respectively. The frequencies of the extra acentrics were 0.21±0.026 % and 0.06±0.018 % in the tested and control groups (p < 0.01), respectively. The total chromosomal aberration frequencies of the tested and control groups were 0.40±0.036 % and 0.20±0.034 % (p < 0.01), respectively. The MN and MNC frequencies of the tested group were 29.25±3.96 0/00 and 23.85±4.23 0/00, and 25.30±6.45 0/00 and 21.56±3.99 0/00 for control group (p < 0.01). With the exception of dicentrics, there were significant differences (p < 0.01) between two groups in frequencies of chromosome aberration and MN. Generally, 1 y after the Fukushima nuclear accident, the dicentric frequencies had not increased in the 156 persons investigated in this study. The increase in chromatid aberrations, chromosomal acentrics and MN was induced but could not be directly linked to radiation exposures, as an excess of dicentric frequency is linked. However, the observed higher frequency of chromosomal alterations might be related to exposure to the low doses of ionising in this cohort. Consequently, it is recommended to assess the long-term health effects in this

  17. LOSCAR: Long-term Ocean-atmosphere-Sediment CArbon cycle Reservoir Model v2.0.4

    Directory of Open Access Journals (Sweden)

    R. E. Zeebe

    2012-01-01

    Full Text Available The LOSCAR model is designed to efficiently compute the partitioning of carbon between ocean, atmosphere, and sediments on time scales ranging from centuries to millions of years. While a variety of computationally inexpensive carbon cycle models are already available, many are missing a critical sediment component, which is indispensable for long-term integrations. One of LOSCAR's strengths is the coupling of ocean-atmosphere routines to a computationally efficient sediment module. This allows, for instance, adequate computation of CaCO3 dissolution, calcite compensation, and long-term carbon cycle fluxes, including weathering of carbonate and silicate rocks. The ocean component includes various biogeochemical tracers such as total carbon, alkalinity, phosphate, oxygen, and stable carbon isotopes. LOSCAR's configuration of ocean geometry is flexible and allows for easy switching between modern and paleo-versions. We have previously published applications of the model tackling future projections of ocean chemistry and weathering, pCO2 sensitivity to carbon cycle perturbations throughout the Cenozoic, and carbon/calcium cycling during the Paleocene-Eocene Thermal Maximum. The focus of the present contribution is the detailed description of the model including numerical architecture, processes and parameterizations, tuning, and examples of input and output. Typical CPU integration times of LOSCAR are of order seconds for several thousand model years on current standard desktop machines. The LOSCAR source code in C can be obtained from the author by sending a request to loscar.model@gmail.com.

  18. The prevalence of allergic diseases in an unselected group of 6-year-old children. The DARC birth cohort study

    DEFF Research Database (Denmark)

    Kjaer, Henrik Fomsgaard; Eller, Esben; Høst, Arne

    2008-01-01

    dermatitis, asthma and rhinoconjunctivitis was 14.4%, 6.2% and 13.6%. 25.7% of the children suffered from at least one of the three diseases. The frequency of sensitization in children with no disease (controls), any allergic disease, atopic dermatitis, asthma and rhinoconjunctivitis was 17%, 45%, 47%, 56......% and 55% (defined as SPT >/=3 mm and/or S-IgE >/=0.35 kU/l for at least one allergen). Symptoms were linked to sensitization for 44% in the asthma group and 42% in the rhinoconjunctivitis group, whereas sensitization could not be linked to worsening of the eczema in any cases of atopic dermatitis. Overlap...

  19. Estimated Glomerular Filtration Rate, Cardiovascular Events and Mortality Across Age Groups Among Individuals Older Than 60 Years in Southern Europe.

    Science.gov (United States)

    Salvador-González, Betlem; Gil-Terrón, Neus; Cerain-Herrero, M Jesús; Subirana, Isaac; Güell-Miró, Roser; Rodríguez-Latre, Luisa M; Cunillera-Puértolas, Oriol; Elosua, Roberto; Grau, Maria; Vila, Joan; Pascual-Benito, Luisa; Mestre-Ferrer, Jordi; Ramos, Rafel; Baena-Díez, José Miguel; Soler-Vila, Maria; Alonso-Bes, Eva; Ruipérez-Guijarro, Laura; Álvarez-Funes, Virtudes; Freixes-Villaró, Esther; Rodríguez-Pascual, Mercedes; Martínez-Castelao, Alberto

    2018-06-01

    Individuals with a decreased estimated glomerular filtration rate (eGFR) are at increased risk of all-cause (ACM) and cardiovascular mortality; there is ongoing debate about whether older individuals with eGFR 45 to 59mL/min/1.73 m 2 are also at increased risk. We evaluated the association between eGFR and ACM and cardiovascular events (CVE) in people aged 60 to 74 and ≥ 75 years in a population with a low coronary disease incidence. We conducted a retrospective cohort study by using primary care and hospital electronic records. We included 130 233 individuals aged ≥ 60 years with creatinine measurement between January 1, 2010 and December 31, 2011; eGFR was estimated by using the Chronic Kidney Disease Epidemiology Collaboration creatinine equation. The independent association between eGFR and the risk of ACM and hospital admission due to CVE were determined with Cox and Fine-Gray regressions, respectively. The median was age 70 years, and 56.1% were women; 13.5% had eGFR < 60 (69.7% eGFR 45-59). During a median follow-up of 38.2 months, 6474 participants died and 3746 had a CVE. For ACM and CVE, the HR in older individuals became significant at eGFR < 60. Fully adjusted HR for ACM in the eGFR 45 to 59 category were 1.61; 95%CI, 1.37-1.89 and 1.19; 95%CI, 1.10-1.28 in 60- to 74-year-olds and ≥ 75-year-olds, respectively; for CVE HR were 1.28; 95%CI, 1.08-1.51 and 1.12; 95%CI, 0.99-1.26. In a region with low coronary disease incidence, the risk of death and CVE increased with decreasing eGFR. In ≥ 75-year-olds, the eGFR 45 to 59 category, which had borderline risk for CVE, included many individuals without significant additional risk. Copyright © 2017 Sociedad Española de Cardiología. Published by Elsevier España, S.L.U. All rights reserved.

  20. Mexican Children under 2 Years of Age Consume Food Groups High in Energy and Low in Micronutrients.

    Science.gov (United States)

    Rodríguez-Ramírez, Sonia; Muñoz-Espinosa, Alicia; Rivera, Juan A; González-Castell, Dinorah; González de Cosío, Teresita

    2016-09-01

    Mexico faces malnutrition problems in the child population. Analysis of food consumption in small children allows us to identify and propose strategies focused on feeding to improve their nutritional status. We described the consumption of beverages and food groups in Mexican children ENSANUT (National Health and Nutrition Study). Dietary information was obtained through 24-h recalls. The foods and beverages consumed were divided into 17 groups. Consumption was estimated in grams or milliliters, kilocalories per day, and percentage of energy (PE) per day. The percentage of consumers was calculated for each food group and stratified by age (<6, 6-11, and 12-23 mo) and by breastfeeding status (breastfed or not breastfed). Differences in the consumption of food groups were analyzed by breastfeeding status, area of residence (urban or rural), and socioeconomic status (SES) by using linear regression adjusted for age, breastfeeding status, and survey design. Only 35% of the children consumed breast milk. Infant formula was consumed by 48% in children aged <6 mo and by 33% in children 6-11 mo old. More than 35% of the children aged 6-11 and 12-23 mo and 12% of children <6 mo old consumed nondairy sugar-sweetened beverages. Legumes and seeds and maize-based preparations contributed a higher PE in rural areas (3.4% and 1.9%, respectively) than in urban areas (11.1% and 6.4%, respectively) (P < 0.05). Children from the lowest SES category consumed less PE from cereals other than maize (2.4%) and more from maize-based preparations (10.2%) than did the middle (4.9% from other cereals and 8.0% from maize) and high (6.0% from other cereals and 4.5% from maize) SES categories (P < 0.05). Mexican children <24 mo of age do not consume a diet that meets recommendations, which is consistent with the high prevalence of malnutrition in Mexico. © 2016 American Society for Nutrition.

  1. Diabetes and work: 12-year national follow-up study of the association of diabetes incidence with socioeconomic group, age, gender and country of origin.

    Science.gov (United States)

    Poulsen, Kjeld; Cleal, Bryan; Willaing, Ingrid

    2014-12-01

    To investigate the extent and socioeconomic distribution of incident diabetes among the Danish working-age population. The Danish National Diabetes Register was linked with socioeconomic and population-based registers covering the entire population. We analysed the 12-year diabetes incidence using multivariate Poisson regression for 2,086,682 people, adjusting for gender, 10-year age groups, main population groups defined by country of origin, and seven socioeconomic groups: professionals, managers, technicians, workers skilled at basic level, unskilled workers, unemployed and pensioners. The crude 12-year incidence of diabetes was 5.8%. The saturated multivariate model, adjusted for gender, age, country of origin and socioeconomic status; showed a relative risk (RR) for diabetes incidence of 1.44 for male (reference: female), 3.95 for the age range of 50-59 years (reference: 30-39 years), 2.07 for unskilled workers (reference: professionals) and 2.15 for people from countries of 'non-Western origin' (reference: Danish origin). Diabetes incidence increases with age, male gender and low socioeconomic status; and also among people from countries of 'non-Western origin'. The results indicate that getting a more senior workforce will substantially increase the proportion of workers with diabetes, especially among already vulnerable groups. © 2014 the Nordic Societies of Public Health.

  2. A Pending Major Crisis: An Analysis of the Critical Shortage of US Army Officers in Year Groups 1991-1997

    Science.gov (United States)

    2008-12-12

    is before 20 years. 89 We dont do it for the Money. But, the hardships our families go thru need to be compensated for to retain quantity and...work and skill. The menu of incentives is a slap in the face. Give to all, or dont give at all. We are overlooked for incentives and bonuses b/c... posters must have some draft phobia or conspiracy assumptions that drive their thinking because the history of the Army makes aa draft highly unlikely

  3. Fabrication of magnetic Fe@ZnO_0_._6S_0_._4 nanocomposite for visible-light-driven photocatalytic inactivation of Escherichia coli

    International Nuclear Information System (INIS)

    Peng, Ziling; Wu, Dan; Wang, Wei; Tan, Fatang; Ng, Tsz Wai; Chen, Jianguo; Qiao, Xueliang; Wong, Po Keung

    2017-01-01

    Highlights: • Fe@ZnO_0_._6S_0_._4 was prepared by a facile two-step precipitation method. • Fe@ZnO_0_._6S_0_._4 exhibited high photocatalytic activity under LED lamp irradiation. • Fe@ZnO_0_._6S_0_._4 possessed good stability and reusability for bacterial inactivation. • Fe@ZnO_0_._6S_0_._4 could be easily collected from the reaction solution by a magnet. • The release rate of metal ions from nanocomposite was kept at a very low level. - Abstract: Bacterial inactivation by magnetic photocatalysts has now received growing interests due to the easy separation for recycle and reuse of photocatalysts. In this study, magnetic Fe@ZnO_0_._6S_0_._4 photocatalyst was prepared by a facile two-step precipitation method. Multiple techniques such as X-ray diffraction (XRD), transmission electron microscope (TEM), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), UV–vis diffused reflectance spectra (UV-vis DRS) and vibrating sample magnetometer (VSM) were employed to characterize the structure, morphology and physicochemical properties of the photocatalyst. The as-obtained Fe@ZnO_0_._6S_0_._4 possessing magnetic property was easily collected from the reaction system by a magnet. Under white light-emitting-diode (LED) lamp irradiation, Fe@ZnO_0_._6S_0_._4 nanocomposite could completely inactivate 7-log of Escherichia coli K-12 within 5 h. More importantly, almost no decrease of photocatalytic efficiency in bacterial inactivation was observed even after five consecutive cycles, demonstrating Fe@ZnO_0_._6S_0_._4 exhibited good stability for reuse. The low released rate of Fe"2"+/Fe"3"+ and Zn"2"+ from Fe@ZnO_0_._6S_0_._4 composite further indicated the photocatalyst showed low cytotoxicity to bacterium and high stability under LED lamp irradiation. Facile preparation, high photocatalytic efficiency, good stability and reusability, and magnetic recovery property endow Fe@ZnO_0_._6S_0_._4 nanocomposite to be a promising photocatalytic material

  4. Fabrication of magnetic Fe@ZnO{sub 0.6}S{sub 0.4} nanocomposite for visible-light-driven photocatalytic inactivation of Escherichia coli

    Energy Technology Data Exchange (ETDEWEB)

    Peng, Ziling [State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, Hubei (China); Wu, Dan [School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong Special Administrative Region (China); Wang, Wei, E-mail: weiwang@hust.edu.cn [State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, Hubei (China); Tan, Fatang [State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, Hubei (China); Ng, Tsz Wai [School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong Special Administrative Region (China); Chen, Jianguo; Qiao, Xueliang [State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, Hubei (China); Wong, Po Keung, E-mail: pkwong@cuhk.edu.hk [School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong Special Administrative Region (China)

    2017-02-28

    Highlights: • Fe@ZnO{sub 0.6}S{sub 0.4} was prepared by a facile two-step precipitation method. • Fe@ZnO{sub 0.6}S{sub 0.4} exhibited high photocatalytic activity under LED lamp irradiation. • Fe@ZnO{sub 0.6}S{sub 0.4} possessed good stability and reusability for bacterial inactivation. • Fe@ZnO{sub 0.6}S{sub 0.4} could be easily collected from the reaction solution by a magnet. • The release rate of metal ions from nanocomposite was kept at a very low level. - Abstract: Bacterial inactivation by magnetic photocatalysts has now received growing interests due to the easy separation for recycle and reuse of photocatalysts. In this study, magnetic Fe@ZnO{sub 0.6}S{sub 0.4} photocatalyst was prepared by a facile two-step precipitation method. Multiple techniques such as X-ray diffraction (XRD), transmission electron microscope (TEM), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), UV–vis diffused reflectance spectra (UV-vis DRS) and vibrating sample magnetometer (VSM) were employed to characterize the structure, morphology and physicochemical properties of the photocatalyst. The as-obtained Fe@ZnO{sub 0.6}S{sub 0.4} possessing magnetic property was easily collected from the reaction system by a magnet. Under white light-emitting-diode (LED) lamp irradiation, Fe@ZnO{sub 0.6}S{sub 0.4} nanocomposite could completely inactivate 7-log of Escherichia coli K-12 within 5 h. More importantly, almost no decrease of photocatalytic efficiency in bacterial inactivation was observed even after five consecutive cycles, demonstrating Fe@ZnO{sub 0.6}S{sub 0.4} exhibited good stability for reuse. The low released rate of Fe{sup 2+}/Fe{sup 3+} and Zn{sup 2+} from Fe@ZnO{sub 0.6}S{sub 0.4} composite further indicated the photocatalyst showed low cytotoxicity to bacterium and high stability under LED lamp irradiation. Facile preparation, high photocatalytic efficiency, good stability and reusability, and magnetic recovery property endow Fe@ZnO{sub 0

  5. High figure of merit and thermoelectric properties of Bi-doped Mg2Si0.4Sn0.6 solid solutions

    International Nuclear Information System (INIS)

    Liu, Wei; Zhang, Qiang; Yin, Kang; Chi, Hang; Zhou, Xiaoyuan; Tang, Xinfeng; Uher, Ctirad

    2013-01-01

    The study of Mg 2 Si 1−x Sn x -based thermoelectric materials has received widespread attention due to a potentially high thermoelectric performance, abundant raw materials, relatively low cost of modules, and non-toxic character of compounds. In this research, Mg 2.16 (Si 0.4 Sn 0.6 ) 1−y Bi y solid solutions with the nominal Bi content of 0≤y≤0.03 are prepared using a two-step solid state reaction followed by spark plasma sintering consolidation. Within this range of Bi concentrations, no evidence of second phase segregation was found. Bi is confirmed to occupy the Si/Sn sites in the crystal lattice and behaves as an efficient n-type dopant in Mg 2 Si 0.4 Sn 0.6 . Similar to the effect of Sb, Bi doping greatly increases the electron density and the power factor, and reduces the lattice thermal conductivity of Mg 2.16 Si 0.4 Sn 0.6 solid solutions. Overall, the thermoelectric figure of merit of Bi-doped Mg 2.16 Si 0.4 Sn 0.6 solid solutions is improved by about 10% in comparison to values obtained with Sb-doped materials of comparable dopant content. This improvement comes chiefly from a marginally higher Seebeck coefficient of Bi-doped solid solutions. The highest ZT∼1.4 is achieved for the y=0.03 composition at 800 K. - Graphical abstract: (a)The relationship between electrical conductivity and power factor for Sb/Bi-doped Mg 2.16 (Si 0.4 Sn 0.6 ) 1−y (Sb/Bi) y (0 2.16 (Si 0.4 Sn 0.6 ) 1−y Bi y (0≤y≤0.03) solid solutions. (c)Temperature dependent dimensionless figure of merit ZT of Mg 2.16 (Si 0.4 Sn 0.6 ) 1−y Bi y (0≤y≤0.03) solid solutions. - Highlights: • Bi doped Mg 2.16 Si 0.4 Sn 0.6 showed 15% enhancement in the power factor as compared to Sb doped samples. • Bi doping reduced κ ph of Mg 2.16 Si 0.4 Sn 0.6 due to stronger point defect scattering. • The highest ZT=1.4 at 800 K was achieved for Mg 2.16 (Si 0.4 Sn 0.6 ) 0.97 Bi 0.03

  6. [The social recruitment of medical students in year group 2006 and 2007 at the University of Copenhagen].

    Science.gov (United States)

    Pedersen, Laura Toftegaard; Bak, Nanna Hasle; Petersson, Birgit H

    2010-01-18

    To study the social recruitment of medical students at the University of Copenhagen in 2006 and 2007 and compare it to the social recruitment in 1992, the Danish population and other study programmes. Questionnaire survey of first-year medical students from year 2006-2007. The population comprised 446 students, of whom 71% were women. They were categorised according to parents' social class, parents' education and presence of doctors in the family. 81% of the students belonged to social class I and II, 41% of the students' parents had a higher education and 17% had at least one parent who was a trained physician. For the Danish population and for students at Psychology and the Humanities, the numbers were significantly lower. Fewer students were recruited from the higher social classes in 1992, but more students had parents with higher education. In 1992, the quota system had an equalizing effect on the distribution across social classes; this effect did not seem to be present in 2006-07. The distribution of medical students across social classes is less equal than in the rest of the Danish population and has remained close to unchanged in the period 1992 to 2007. Furthermore, the medical school recruits more students from higher socioeconomic backgrounds than other fields of study at the University of Copenhagen. There is a need for an increased focus on the social recruitment and an intensified effort to recruit a more differentiated segment of students, among others through an increase in quota 2 admission rates.

  7. SERUM PROLACTIN LEVEL IN ACNE PATIENTS VERSUS CONTROL GROUP: STUDY ON 14 TO 35 YEARS OLD WOMEN

    Directory of Open Access Journals (Sweden)

    G FAGHIHI

    2002-03-01

    Full Text Available Introduction. Androgens have a main role in acne pathogenesis. The interaction between prolactin and androgens generate the hypothesis of prolactin role in acne pathogenesis. Methods. In a case - control study, 71 women with modearte to severe acne were compaired with 71 healthy women about their serum prolactin levels. Results. Mean of serum prolactin level was 533 632 miu/lit in cases. Mean of serum prolactin level was 365 363 in control group (P > 0.05. There was a significant correlation between serum prolactin level and severity of acne. Discussion. Despite the non significant difference between serum prolactin level in acne patients and healthy women, thare was a significant relationship between serum prolactin level and severity of acne. It may be due to our small sample size. However, the more powerful studies is needed.

  8. Facilitation of the Estuary/Ocean Subgroup and the Expert Regional Technical Group, Fiscal Year 2013 Annual Report

    Energy Technology Data Exchange (ETDEWEB)

    Johnson, Gary E.; Sather, Nichole K.

    2013-10-30

    This project covers facilitation of the Estuary/Ocean Subgroup (EOS) for federal research, monitoring, and evaluation (RME) and the Expert Regional Technical Group (ERTG) for estuary habitat restoration. The EOS is part of the research, monitoring, and evaluation effort that the Action Agencies (Bonneville Power Administration [BPA], U.S. Army Corps of Engineers [Corps], U.S. Bureau of Reclamation) developed in response to obligations arising from the Endangered Species Act as applied to operation of the Federal Columbia River Power System (FCRPS). The EOS is tasked by National Marine Fisheries Service (NMFS) and the Action Agencies (AAs) to design and coordinate implementation of the federal RME plan for the lower Columbia River and estuary, including the river’s plume in the ocean. Initiated in 2002, the EOS is composed of members from BPA, the Corps, NMFS, and Pacific Northwest National Laboratory’s (PNNL’s) Marine Sciences Laboratory, and other agencies as necessary.

  9. Can finasteride reverse the progress of benign prostatic hyperplasia? A two-year placebo-controlled study. The Scandinavian BPH Study Group

    DEFF Research Database (Denmark)

    Andersen, J T; Ekman, P; Wolf, H

    1995-01-01

    rate, prostate volume, postvoiding residual urinary volume, and serum concentrations of prostate-specific antigen together with laboratory safety parameters were measured at entry and at months 12 and 24. Interim physical and laboratory examinations were performed when indicated clinically. RESULTS......OBJECTIVES. To study if placebo-induced improvement in men with symptomatic benign prostatic hyperplasia (BPH) is maintained over 2 years, and to study the efficacy and safety from intervention with finasteride 5 mg for 24 months. METHODS. This was a multicenter, double-blind, placebo....... The maximum urinary flow rate decreased in the placebo group, but improved in the finasteride group, resulting in a between-group difference of 1.8 mL/s at 24 months (P prostate volume was +12% in the placebo group versus -19% in the finasteride-treated group (P

  10. A study on some motoric and anthropometric attributes of competitive and non - competitive taekwondo athletes between the age group 9 - 12 years

    Directory of Open Access Journals (Sweden)

    Duygu SEVİNÇ

    2015-08-01

    Full Text Available Aim: The aim of this study is to examine some motoric and antrophometric attributes of competitive and non - competitive taekwondo athletes within the age group 9 - 12 years and to det ermine the difference between those two groups. Material and method: 31 competitive and 29 non - competitive licensed taekwondo athletes voluntarily participated in the study. The average ages, heights and weight of competitive and non - competitive athletes w ere 11,16±,93 year, 150,58±17,14 cm and 43,80± 13,97 kg, 9,62±,82 year, 137,31±8,80 cm and 35,24±8,28 kg respectively. Both groups have been practising regularly taekwondo for 2,5 years, 2 days a week and two hours a day. Flamingo balance test, test of dis k touching, sit and reach flexibility test, long jump while standing still, 30 sec sit - up test, bent arm pull - up test and 10x5m push up run, right and left hand grip strength test and 20 m shuttle run of the Eurofit test battery were used. Body fat percen t, body fat mass, fat free mass, body mass index values were measured. Such antrophometric attributes as hand length, calf and femur circumference, arm length, biceps circumference in flexion, arm span length were measured. Results: Results of statistical analyses showed a significant difference between two groups in terms of motoric scores (p<0,01, p<0,001, antrophometric characteristics ( p<0,01, p<0,001, and fat free mass ( p<0,001 in favor of the competitive group. Conclusion: Compared with the no n - competitive group, significant differences in competitive group can be explained by their active participation in competitions.

  11. What Hispanic parents do to encourage and discourage 3-5 year old children to be active: a qualitative study using nominal group technique.

    Science.gov (United States)

    O'Connor, Teresia M; Cerin, Ester; Hughes, Sheryl O; Robles, Jessica; Thompson, Deborah; Baranowski, Tom; Lee, Rebecca E; Nicklas, Theresa; Shewchuk, Richard M

    2013-08-06

    Hispanic preschoolers are less active than their non-Hispanic peers. As part of a feasibility study to assess environmental and parenting influences on preschooler physical activity (PA) (Niños Activos), the aim of this study was to identify what parents do to encourage or discourage PA among Hispanic 3-5 year old children to inform the development of a new PA parenting practice instrument and future interventions to increase PA among Hispanic youth. Nominal Group Technique (NGT), a structured multi-step group procedure, was used to elicit and prioritize responses from 10 groups of Hispanic parents regarding what parents do to encourage (5 groups) or discourage (5 groups) preschool aged children to be active. Five groups consisted of parents with low education (less than high school) and 5 with high education (high school or greater) distributed between the two NGT questions. Ten NGT groups (n = 74, range 4-11/group) generated 20-46 and 42-69 responses/group for practices that encourage or discourage PA respectively. Eight to 18 responses/group were elected as the most likely to encourage or discourage PA. Parental engagement in child activities, modeling PA, and feeding the child well were identified as parenting practices that encourage child PA. Allowing TV and videogame use, psychological control, physical or emotional abuse, and lack of parental engagement emerged as parenting practices that discourage children from being active. There were few differences in the pattern of responses by education level. Parents identified ways they encourage and discourage 3-5 year-olds from PA, suggesting both are important targets for interventions. These will inform the development of a new PA parenting practice scale to be further evaluated. Further research should explore the role parents play in discouraging child PA, especially in using psychological control or submitting children to abuse, which were new findings in this study.

  12. Eight years' experience with a Medical Education Journal Club in Mexico: a quasi-experimental one-group study.

    Science.gov (United States)

    Sánchez-Mendiola, Melchor; Morales-Castillo, Daniel; Torruco-García, Uri; Varela-Ruiz, Margarita

    2015-12-14

    A time-honored strategy for keeping up to date in medicine and improving critical appraisal skills is the Journal Club (JC). There are several reports of its use in medicine and allied health sciences but almost no reports of JC focused on medical education. The purpose of the study is to describe and evaluate an eight years' experience with a medical education Journal Club (MEJC). We started a monthly medical education JC in 2006 at UNAM Faculty of Medicine in Mexico City. Its goal is to provide faculty with continuing professional development in medical education. A discussion guide and a published paper were sent 2 weeks before sessions. We reviewed the themes and publication types of the papers used in the sessions, and in June-July 2014 administered a retrospective post-then-pre evaluation questionnaire to current participants that had been regular attendees to the JC for more than 2 years. The retrospective post-then-pre comparisons were analyzed with Wilcoxon signed-rank test. Effect sizes were calculated for the pre-post comparisons with Cohen's r. There have been 94 MEJC sessions until July 2014. Average attendance is 20 persons, a mix of clinicians, educators, psychologists and a sociologist. The articles were published in 32 different journals, and covered several medical education themes (curriculum, faculty development, educational research methodology, learning methods, assessment, residency education). 22 Attendees answered the evaluation instrument. The MEJC had a positive evaluation from good to excellent, and there was an improvement in self-reported competencies in medical education literature critical appraisal and behaviors related to the use of evidence in educational practice, with a median effect size higher than 0.5. The evaluation instrument had a Cronbach's alpha of 0.96. A periodic Medical Education Journal Club can improve critical appraisal of the literature, and be maintained long-term using evidence-based strategies. This activity

  13. Group cognitive behavioral therapy for patients with generalized social anxiety disorder in Japan: outcomes at 1-year follow up and outcome predictors

    Science.gov (United States)

    Kawaguchi, Akiko; Watanabe, Norio; Nakano, Yumi; Ogawa, Sei; Suzuki, Masako; Kondo, Masaki; Furukawa, Toshi A; Akechi, Tatsuo

    2013-01-01

    Background Social anxiety disorder (SAD) is one of the most common psychiatric disorders worldwide. Cognitive behavioral therapy (CBT) is an effective treatment option for patients with SAD. In the present study, we examined the efficacy of group CBT for patients with generalized SAD in Japan at 1-year follow-up and investigated predictors with regard to outcomes. Methods This study was conducted as a single-arm, naturalistic, follow-up study in a routine Japanese clinical setting. A total of 113 outpatients with generalized SAD participated in group CBT from July 2003 to August 2010 and were assessed at follow-ups for up to 1 year. Primary outcome was the total score on the Social Phobia Scale/Social Interaction Anxiety Scale (SPS/SIAS) at 1 year. Possible baseline predictors were investigated using mixed-model analyses. Results Among the 113 patients, 70 completed the assessment at the 1-year follow-up. The SPS/SIAS scores showed significant improvement throughout the follow-ups for up to 1 year. The effect sizes of SPS/SIAS at the 1-year follow-up were 0.68 (95% confidence interval 0.41–0.95)/0.76 (0.49–1.03) in the intention-to-treat group and 0.77 (0.42–1.10)/0.84 (0.49–1.18) in completers. Older age at baseline, late onset, and lower severity of SAD were significantly associated with good outcomes as a result of mixed-model analyses. Conclusions CBT for patients with generalized SAD in Japan is effective for up to 1 year after treatment. The effect sizes were as large as those in previous studies conducted in Western countries. Older age at baseline, late onset, and lower severity of SAD were predictors for a good outcome from group CBT. PMID:23450841

  14. Improving Executive Functions in 5- and 6-year-olds: Evaluation of a Small Group Intervention in Prekindergarten and Kindergarten Children

    Science.gov (United States)

    Röthlisberger, Marianne; Neuenschwander, Regula; Cimeli, Patriza; Michel, Eva; Roebers, Claudia M.

    2012-01-01

    Research suggests a central role of executive functions for children's cognitive and social development during preschool years, especially in promoting school readiness. Interventions aiming to improve executive functions are therefore being called for. The present study examined the effect of a small group intervention implemented in kindergarten…

  15. The Moving Group Targets of the SEEDS High-contrast Imaging Survey of Exoplanets and Disks: Results and Observations from the First Three Years

    NARCIS (Netherlands)

    Brandt, T.D.; et al., [Unknown; Thalmann, C.

    2014-01-01

    We present results from the first three years of observations of moving group (MG) targets in the Strategic Exploration of Exoplanets and Disks with Subaru (SEEDS) high-contrast imaging survey of exoplanets and disks using the Subaru telescope. We achieve typical contrasts of ~105 at 1'' and ~106

  16. Software for optimal selection of places for installation of balancing devices in 0,4 kV electric power systems loaded with electric motors

    Directory of Open Access Journals (Sweden)

    Romanova Victoria

    2017-01-01

    Full Text Available This publication considers the issues of development of the software program for designing of 0,4 kV power supply systems with motor-actuated load under voltage unsymmetry conditions (using the example of the Trans-Baikal Territory. Voltage unsymmetry is practically constant phenomenon in the electric power networks of different voltage types. Voltage unsymmetry effects significantly the electric power consumers, including the supply mains itself. It has especially negative impact on the electrical equipment operation process and its lifetime. The urgency of the problem is confirmed by multiple research on the same topic and by significant number of damages suffered by the electric power consumers staying in service (especially in the Trans-Baikal Territory and in the Far-East regions. Voltage unsymmetry causes economic loss and reduction of the electromagnetic interference value by the voltage unsymmetry coefficient in negative-phase sequence (K2U gives inevitable economic effect accordingly. However, the payback period for the activities aimed at reduction of electromagnetic interference, will vary from some months to several years. The more accurate value of the payback period may be obtained using the developed software program. The developed software design program is implemented by means of the programming language C# in Microsoft Visual Studio environment, using the built-in cross-platform database SQLite. The software program shall allow making quick and accurate calculation of the power losses, to determine the economic feasibility of provision special measures for removal of the voltage unsymmetry, for determination of optimal application and location of the balancing devices. The software implementation in power systems loaded with electric motors will improve reliability and efficiency of asynchronous motors. The software is of interest for developers of projects on power supply systems for regions with non-linear loads.

  17. A founder mutation in LEPRE1 carried by 1.5% of West Africans and 0.4% of African Americans causes lethal recessive osteogenesis imperfecta.

    Science.gov (United States)

    Cabral, Wayne A; Barnes, Aileen M; Adeyemo, Adebowale; Cushing, Kelly; Chitayat, David; Porter, Forbes D; Panny, Susan R; Gulamali-Majid, Fizza; Tishkoff, Sarah A; Rebbeck, Timothy R; Gueye, Serigne M; Bailey-Wilson, Joan E; Brody, Lawrence C; Rotimi, Charles N; Marini, Joan C

    2012-05-01

    Deficiency of prolyl 3-hydroxylase 1, encoded by LEPRE1, causes recessive osteogenesis imperfecta (OI). We previously identified a LEPRE1 mutation exclusively in African Americans and contemporary West Africans. We hypothesized that this allele originated in West Africa and was introduced to the Americas with the Atlantic slave trade. We aimed to determine the frequency of carriers for this mutation among African Americans and West Africans, and the mutation origin and age. Genomic DNA was screened for the mutation using PCR and restriction digestion, and a custom TaqMan genomic single-nucleotide polymorphism assay. The mutation age was estimated using microsatellites and short tandem repeats spanning 4.2 Mb surrounding LEPRE1 in probands and carriers. Approximately 0.4% (95% confidence interval: 0.22-0.68%) of Mid-Atlantic African Americans carry this mutation, estimating recessive OI in 1/260,000 births in this population. In Nigeria and Ghana, 1.48% (95% confidence interval: 0.95-2.30%) of unrelated individuals are heterozygous carriers, predicting that 1/18,260 births will be affected with recessive OI, equal to the incidence of de novo dominant OI. The mutation was not detected in Africans from surrounding countries. All carriers shared a haplotype of 63-770 Kb, consistent with a single founder for this mutation. Using linkage disequilibrium analysis, the mutation was estimated to have originated between 650 and 900 years before present (1100-1350 CE). We identified a West African founder mutation for recessive OI in LEPRE1. Nearly 1.5% of Ghanians and Nigerians are carriers. The estimated age of this allele is consistent with introduction to North America via the Atlantic slave trade (1501-1867 CE).

  18. Comparison of Readmission Rates After Acute Myocardial Infarction in 3 Patient Age Groups (18 to 44, 45 to 64, and ≥65 Years) in the United States.

    Science.gov (United States)

    Khera, Rohan; Jain, Snigdha; Pandey, Ambarish; Agusala, Vijay; Kumbhani, Dharam J; Das, Sandeep R; Berry, Jarett D; de Lemos, James A; Girotra, Saket

    2017-11-15

    Postacute myocardial infarction (AMI) readmissions are common among Medicare beneficiaries (≥65 years) and are associated with significant resource utilization. However, patterns of AMI readmissions for younger age groups in the United States are not known. In the Nationwide Readmissions Database, a nationally representative all-payer database of inpatient hospitalizations, we identified 212,171 index AMI hospitalizations in January to November 2013, weighted to represent 478,247 hospitalizations nationally (mean age 66.9 years, 38% women, 29% low income). This included 26,516 cases in the 18 to 44 age group, 183,703 in the 45 to 64 age group, and 268,027 in the ≥65 age group. The overall 30-day readmission rate was 14.5% and varied across age groups (9.7% [18 to 44], 11.2% [45 to 64], and 17.3% [≥65]). The cumulative cost of 30-day readmissions was $1.1 billion, of which $365 million was spent on those age. In multivariable hierarchical models, the risk of readmission was higher in women and in low-income patients, but the effect varied by age (p value for age-gender and age-income interactions age groups. Further, patients in all age groups continue to have a high hospitalization burden beyond the typical 30-day readmission period, with an overall 24% post-AMI 90-day readmission rate. In conclusion, readmissions in young and middle-aged AMI survivors pose a substantial burden on patients and on U.S. health-care resources. Women and low-income patients with AMI, particularly those in younger age groups, are more frequently readmitted, and readmissions continue to burden the health-care system beyond the typical 30-day window. Future investigations would need to be targeted toward a better understanding and improvement of the rehospitalization burden for vulnerable patient groups. Copyright © 2017 Elsevier Inc. All rights reserved.

  19. Fifty years of Brazilian Dental Materials Group: scientific contributions of dental materials field evaluated by systematic review

    Science.gov (United States)

    ROSA, Wellington Luiz de Oliveira; SILVA, Tiago Machado; LIMA, Giana da Silveira; SILVA, Adriana Fernandes; PIVA, Evandro

    2016-01-01

    ABSTRACT Objective A systematic review was conducted to analyze Brazilian scientific and technological production related to the dental materials field over the past 50 years. Material and Methods This study followed the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (Prisma) statement. Searches were performed until December 2014 in six databases: MedLine (PubMed), Scopus, LILACS, IBECS, BBO, and the Cochrane Library. Additionally, the Brazilian patent database (INPI - Instituto Nacional de Propriedade Industrial) was screened in order to get an overview of Brazilian technological development in the dental materials field. Two reviewers independently analyzed the documents. Only studies and patents related to dental materials were included in this review. Data regarding the material category, dental specialty, number of documents and patents, filiation countries, and the number of citations were tabulated and analyzed in Microsoft Office Excel (Microsoft Corporation, Redmond, Washington, United States). Results A total of 115,806 studies and 53 patents were related to dental materials and were included in this review. Brazil had 8% affiliation in studies related to dental materials, and the majority of the papers published were related to dental implants (1,137 papers), synthetic resins (681 papers), dental cements (440 papers), dental alloys (392 papers) and dental adhesives (361 papers). The Brazilian technological development with patented dental materials was smaller than the scientific production. The most patented type of material was dental alloys (11 patents), followed by dental implants (8 patents) and composite resins (7 patents). Conclusions Dental materials science has had a substantial number of records, demonstrating an important presence in scientific and technological development of dentistry. In addition, it is important to approximate the relationship between academia and industry to expand the technological development in

  20. Fifty years of Brazilian Dental Materials Group: scientific contributions of dental materials field evaluated by systematic review.

    Science.gov (United States)

    Rosa, Wellington Luiz de Oliveira; Silva, Tiago Machado; Lima, Giana da Silveira; Silva, Adriana Fernandes; Piva, Evandro

    2016-01-01

    A systematic review was conducted to analyze Brazilian scientific and technological production related to the dental materials field over the past 50 years. This study followed the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (Prisma) statement. Searches were performed until December 2014 in six databases: MedLine (PubMed), Scopus, LILACS, IBECS, BBO, and the Cochrane Library. Additionally, the Brazilian patent database (INPI - Instituto Nacional de Propriedade Industrial) was screened in order to get an overview of Brazilian technological development in the dental materials field. Two reviewers independently analyzed the documents. Only studies and patents related to dental materials were included in this review. Data regarding the material category, dental specialty, number of documents and patents, filiation countries, and the number of citations were tabulated and analyzed in Microsoft Office Excel (Microsoft Corporation, Redmond, Washington, United States). A total of 115,806 studies and 53 patents were related to dental materials and were included in this review. Brazil had 8% affiliation in studies related to dental materials, and the majority of the papers published were related to dental implants (1,137 papers), synthetic resins (681 papers), dental cements (440 papers), dental alloys (392 papers) and dental adhesives (361 papers). The Brazilian technological development with patented dental materials was smaller than the scientific production. The most patented type of material was dental alloys (11 patents), followed by dental implants (8 patents) and composite resins (7 patents). Dental materials science has had a substantial number of records, demonstrating an important presence in scientific and technological development of dentistry. In addition, it is important to approximate the relationship between academia and industry to expand the technological development in countries such as Brazil.

  1. Prevalence of middle cerebral artery stenosis in asymptomatic subjects of more than 40 years age group: a transcranial Doppler study.

    Science.gov (United States)

    Sada, Sujay; Reddy, Yugandhar; Rao, Sampath; Alladi, Suvarna; Kaul, Subash

    2014-01-01

    Middle cerebral artery (MCA) disease is the most common vascular lesion in stroke. Transcranial Doppler (TCD) is a non-invasive bedside screening method for assessing cerebral blood flow. To investigate the prevalence of MCA stenosis in asymptomatic but high-risk individuals for stroke. Prospective study between December 2011 and December 2013. Vascular risk factors considered included: hypertension (HTN), diabetes mellitus, smoking, alcohol consumption, coronary artery disease (CAD), peripheral vascular disease (PVD), hypercholesterolemia and obesity. TCD was performed with portable machine through the temporal windows by use of a standardized protocol. Of the 427 subjects, 374 were analyzed; males 264 (70.6%) and females 110 (29.4%). Mean age was 54.2 ± 7.6 years. The frequency of the risk factors was: HTN 287 (76.7%), diabetes 220 (58.8%), CAD 120 (32.1%), hypercholesterolemia 181 (48.4%), smoking 147 (39.3%), alcohol 99 (26.5%), obesity 198 (52.9%) and PVD 8 (2.1%). Of the 374 subjects, 27 (7.2%) had intracranial arterial stenosis and the rest had normal intracranial arteries. On univariate analysis, subjects with higher age, HTN, CAD, smoking and hypercholesterolemia had higher risk of having intracranial arterial stenosis (P < 0.05). Multivariate analysis showed HTN and CAD are independent risk factors for intracranial arterial stenosis. Overall prevalence of intracranial arterial stenosis is 7.2% in high-risk population sample from Hyderabad in South India. HTN and CAD are independent risk factors for the development of intracranial arterial stenosis.

  2. Effect of Cu-doping on structural and electrical properties of Ni0.4-xCu0.3+xMg0.3Fe2O4 ferrites prepared using sol-gel method

    Science.gov (United States)

    Dhaou, Mohamed Houcine

    2018-06-01

    Ni0.4-xCu0.3+xMg0.3Fe2O4 spinel ferrites were prepared by sol-gel technique. X-ray diffraction results indicate that ferrite samples have a cubic spinel-type structure with ? space group. The electrical properties of the studied samples using complex impedance spectroscopy technique have been investigated as a function of frequency at different temperatures. We found that the addition of copper in Ni0.4-xCu0.3+xMg0.3Fe2O4 ferrite system can improve its conductivity. Dielectric properties have been discussed in terms of hopping of charge carriers between Fe2+ and Fe3+ ions. For all samples, frequency dependence of the imaginary part of impedance (Z") shows the existence of relaxation phenomenon. The appropriate equivalent circuit configuration for modeling the Nyquist plots of impedance is of the type of (Rg + Rgb//Cgb).

  3. Fabrication of aligned porous LaNi0.6Fe0.4O3 perovskite by water based freeze casting

    Science.gov (United States)

    Soltani, Niloofar; Martínez-Bautista, Rubén; Bahrami, Amin; Huerta Arcos, Lázaro; Cassir, Michel; Chávez Carvayar, José

    2018-05-01

    A novel porous cathode of LaNi0.6Fe0.4O3 perovskite with aligned porosities was engineered for solid oxide fuel cells. LaNi0.6Fe0.4O3 was produced through metal nitrate and acid citric combustion method and calcined at different temperatures. The synthesized LNF at 600 °C shows specific surface area (SBET) of 24.4 m2 g-1 and an average pore size of 12.2 nm. The chemical composition and structure of LaNi0.6Fe0.4O3 synthesized at temperature 600-1400 °C, were analyzed by XRD, XPS and HRTEM. SEM observations of freeze cast nano-sized LNF showed the vertically aligned hexagonal walls. These walls contain a great value of fine pores which accelerate the gas transportation.

  4. Growth, and magnetic study of Sm0.4Er0.6FeO3 single crystal grown by optical floating zone technique

    Science.gov (United States)

    Wu, Anhua; Zhao, Xiangyang; Man, Peiwen; Su, Liangbi; Kalashnikova, A. M.; Pisarev, R. V.

    2018-03-01

    Sm0.4Er0.6FeO3 single crystals were successfully grown by optical floating zone method; high quality samples with various orientations were manufactured. Based on these samples, Magnetic property of Sm0.4Er0.6FeO3 single crystals were investigated systemically by means of the temperature dependence of magnetization. It indicated that compositional variations not only alter the spin reorientation temperature, but also the compensation temperature of the orthoferrites. Unlike single rare earth orthoferrites, the reversal transition temperature point of Sm0.4Er0.6FeO3 increases as magnetic field increases, which is positive for designing novel spin switching or magnetic sensor device.

  5. A 9-year follow-up of a self-management group intervention for persistent neck pain in primary health care: a randomized controlled trial

    Directory of Open Access Journals (Sweden)

    Gustavsson C

    2016-12-01

    Full Text Available Catharina Gustavsson,1,2 Lena von Koch1,3,4 1Center for Clinical Research Dalarna, Department of Public Health and Caring Science, Uppsala University, Uppsala, 2School of Education, Health and Social Studies, Dalarna University, Falun, 3Department of Neurobiology, Care Science and Society, Karolinska Institutet, 4Department of Neurology, Karolinska University Hospital, Stockholm, Sweden Background and objective: In previous short-term and 2-year follow-ups, a pain and stress self-management group intervention (PASS had better effect on pain-related disability, self-efficacy, catastrophizing, and perceived pain control than individually administered physiotherapy (IAPT for patients with persistent tension-type neck pain. Studies that have evaluated long-term effects of self-management approaches toward persistent neck pain are sparse. The objective of this study was to compare pain-related disability, self-efficacy for activities of daily living (ADL, catastrophizing, pain, pain control, use of analgesics, and health care utilization in people with persistent tension-type neck pain 9 years after they received the PASS or IAPT. Materials and methods: Of 156 people (PASS, n = 77; IAPT, n = 79 originally included in a randomized controlled trial, 129 people (PASS, n = 63; IAPT, n = 66 were eligible and were approached for the 9-year follow-up. They were sent a self-assessment questionnaire, comprising the Neck Disability Index, the Self-Efficacy Scale, the Coping Strategies Questionnaire, and questions regarding pain, analgesics, and health care utilization. Mixed linear models for repeated measures analysis or generalized estimating equations were used to evaluate the differences between groups and within groups over time (baseline, previous follow-ups, and 9-year follow-up and the interaction effect of “time by group”. Results: Ninety-four participants (73% responded (PASS, n = 48; IAPT, n = 46. At 9 years, PASS participants reported less

  6. Fabrication of magnetic Fe@ZnO0.6S0.4 nanocomposite for visible-light-driven photocatalytic inactivation of Escherichia coli

    Science.gov (United States)

    Peng, Ziling; Wu, Dan; Wang, Wei; Tan, Fatang; Ng, Tsz Wai; Chen, Jianguo; Qiao, Xueliang; Wong, Po Keung

    2017-02-01

    Bacterial inactivation by magnetic photocatalysts has now received growing interests due to the easy separation for recycle and reuse of photocatalysts. In this study, magnetic Fe@ZnO0.6S0.4 photocatalyst was prepared by a facile two-step precipitation method. Multiple techniques such as X-ray diffraction (XRD), transmission electron microscope (TEM), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), UV-vis diffused reflectance spectra (UV-vis DRS) and vibrating sample magnetometer (VSM) were employed to characterize the structure, morphology and physicochemical properties of the photocatalyst. The as-obtained Fe@ZnO0.6S0.4 possessing magnetic property was easily collected from the reaction system by a magnet. Under white light-emitting-diode (LED) lamp irradiation, Fe@ZnO0.6S0.4 nanocomposite could completely inactivate 7-log of Escherichia coli K-12 within 5 h. More importantly, almost no decrease of photocatalytic efficiency in bacterial inactivation was observed even after five consecutive cycles, demonstrating Fe@ZnO0.6S0.4 exhibited good stability for reuse. The low released rate of Fe2+/Fe3+ and Zn2+ from Fe@ZnO0.6S0.4 composite further indicated the photocatalyst showed low cytotoxicity to bacterium and high stability under LED lamp irradiation. Facile preparation, high photocatalytic efficiency, good stability and reusability, and magnetic recovery property endow Fe@ZnO0.6S0.4 nanocomposite to be a promising photocatalytic material for bacterial inactivation.

  7. Electrochemical synthesis of photosensitive nano-nest like CdSe{sub 0.6}Te{sub 0.4} thin films

    Energy Technology Data Exchange (ETDEWEB)

    Shinde, Surendra K., E-mail: surendrashinde.phy@gmail.com [Holography and Material Research Laboratory, Department of Physics, Shivaji University, Kolhapur 416004, M.S (India); Thombare, Jagannath V. [Holography and Material Research Laboratory, Department of Physics, Shivaji University, Kolhapur 416004, M.S (India); Dubal, Deepak P. [Department of Electrochemistry, Technische Universität Chemnitz Institut für Chemie, Straße der Nationen 62, D-09111 Chemnitz (Germany); Fulari, Vijay J., E-mail: vijayfulari@gmail.com [Holography and Material Research Laboratory, Department of Physics, Shivaji University, Kolhapur 416004, M.S (India)

    2013-10-01

    Polycrystalline CdSe{sub 0.6}Te{sub 0.4} thin films were deposited on stainless steel and ITO coated glass (ITO) substrates by using simple and inexpensive electrodeposition method. CdSe{sub 0.6} Te{sub 0.4} films are characterized by different characterization techniques such as X-ray diffraction (XRD), Field emission scanning electron microscopy (FE-SEM), Fourier transform infrared spectroscopy (FTIR) and contact angle measurement. The X-ray diffraction analysis shows that the films are polycrystalline with hexagonal crystal structure. FE-SEM studies reveal that the entire substrate surface is covered with CdSe{sub 0.6} Te{sub 0.4} nano-nest. Formation of CdSe{sub 0.6}Te{sub 0.4} compound was confirmed from the FTIR studies. Optical absorption study shows the presence of direct transition and a considerable band gap, E{sub g} = 1.7 eV. Surface wettability with solid–liquid interface showed hydrophilic nature with water contact angle 57° (<90°). Further photovoltaic activity of CdSe{sub 0.6}Te{sub 0.4} films were studied by forming the photoelectrochemical cell having CdSe{sub 0.6}Te{sub 0.4}/1 M (Na{sub 2}S + S + NaOH)/C cell configuration. The efficiency and fill factor of these PEC cells are found to be 0.64% and 0.49 respectively.

  8. Efficacy and tolerability of tamsulosin 0.4 mg in Asian patients with lower urinary tract symptoms secondary to benign prostatic hyperplasia refractory to tamsulosin 0.2 mg: a randomized placebo controlled trial.

    Science.gov (United States)

    Kim, Jung Jun; Han, Deok Hyun; Sung, Hyun Hwan; Choo, Seol Ho; Lee, Sung Won

    2014-07-01

    To evaluate the efficacy and safety of tamsulosin dose increase to 0.4 mg daily in Asian patients with lower urinary tract symptoms secondary to benign prostatic hyperplasia refractory to tamsulosin 0.2 mg treatment. We carried out a 12-week, single-center, randomized, placebo-controlled trial in 220 patients. Patients treated with 0.2 mg tamsulosin daily without other lower urinary tract symptoms secondary to benign prostatic hyperplasia medication for more than 3 months and refractory to this treatment were enrolled. We defined "refractory" as an International Prostate Symptom Score of 13 or greater and a maximum flow rate of 15 or under despite medication. Patients with a surgical history related to lower urinary tract symptoms secondary to benign prostatic hyperplasia or a postvoid residual of 150 mL or greater were excluded. Eligible patients were randomly assigned to the 0.4 mg group (two tablets of 0.2 mg tamsulosin once daily) or the 0.2 mg group (one tablet of 0.2 mg tamsulosin and one tablet of placebo once daily). International Prostate Symptom Score, maximum flow rate, blood pressure, heart rate, and adverse events were compared between the two groups at 4 weeks and 12 weeks. A total of 220 patients were enrolled and analyzed. There were no differences in baseline characteristics between the two groups. After 12 weeks of medication, the International Prostate Symptom Score was not different between the two groups. However, the improvement in maximum flow rate was greater in the 0.4 mg group than the 0.2 mg group (3.0 ± 0.48 mL/s vs -0.25 ± 0.30 mL/s, P Tamsulosin 0.4 mg appears to be a safe treatment regimen for treating lower urinary tract symptoms secondary to benign prostatic hyperplasia in Asian patients who do not respond to 0.2 mg treatment. Increasing the dose of tamsulosin results in a significant improvement in maximum flow rate without any increase in cardiovascular complications. © 2014 The

  9. Synthesis and electrochemical properties of LiNi0.4Mn1.5Cr0.1O4 and Li4Ti5O12

    CSIR Research Space (South Africa)

    Liu, GQ

    2011-08-01

    Full Text Available Spinel compound LiNi0.4Mn1.5Cr0.1O4 (LNMCO) and Li4Ti5O12 (LTO) were synthesized by the sol-gel method and the solid-state method, respectively. The particle sizes of the products LiNi0.4Mn1.5Cr0.1O4 and Li4Ti5O12 were 0.5 to 2 um and 0.5 to 0.8 um...

  10. Electrical transport properties study of Mo{sub 0.6}W{sub 0.4}Se{sub 2} single crystals

    Energy Technology Data Exchange (ETDEWEB)

    Chaki, Sunil; Deshpande, M. P.; Tailor, J. P.; Chaudhary, M. D.; Sakaria, Pallavi N. [Department of Physics, Sardar Patel University, Vallabh Vidyanagar, Gujarat-388120 (India)

    2012-06-05

    The mixed transition metal dichalcogenide single crystals Mo{sub 0.6}W{sub 0.4}Se{sub 2} were characterized employing EDAX (Energy Dispersive Analysis of X-ray), (XRD) X-ray diffraction, SEM (Scanning Electron Microscope) and UV-Vis-NIR spectroscopy techniques. The electrical transport properties of as-grown Mo{sub 0.6}W{sub 0.4}Se{sub 2} single crystals were studied by two probe d. c. resistivity, Hall Effect and thermoelectric power measurement set-up. The obtained results are discussed in details.

  11. Formation and magnetic properties of compounds Er(Fe1-xCox)11.35Nb0.65 (0≤x≤0.4)

    International Nuclear Information System (INIS)

    Wang, K.-Y.; Chen, D.-X.; Arcas, J.; Multigner, M.; Crespo, P.; Vazquez, M.; Hernando, A.

    1997-01-01

    A new series of compounds Er(Fe 1-x Co x ) 11.35 Nb 0.65 were synthesized. For x≤0.4, the element Nb can stabilize the ThMn 12 -type compounds. X-ray diffraction results show that the lattice parameters a and c decrease with the substitution of Co for Fe atoms. With increasing Co content, the Curie temperature increases from T c =507 K for x=0 to T c =904 K for x=0.4. Values of the saturation magnetization at 5 K and 300 K are reported. (orig.)

  12. Family group interventions in an early psychosis program: A re-evaluation of practice after 10 years of service delivery.

    Science.gov (United States)

    Day, Kate; Starbuck, Rachael; Petrakis, Melissa

    2017-08-01

    The role of family in supporting service users in coping with illness and engaging in relapse prevention in early psychosis is important. Taking on this caring though is stressful and challenging, and it has been found that support and information for carers assists in their coping and reduces isolation. To evaluate the current utility of a psychoeducation group program in a public adult mental health service, for the families of people experiencing early psychosis. A purpose-designed pre- and post-intervention questionnaire was administered to quantitatively measure group participants' changes in perceptions of their understanding of mental illness and its treatment through attending the group. Additional qualitative items were used to determine other knowledge, benefits and any critical feedback. The group program continues to result in highly significant improvements in family members' understanding of psychosis, recovery, medications, relapse prevention and substance co-morbidities. Additional feedback reaffirmed previous findings that family members find group peer support valuable and that this reduces isolation and the experience of stigma. The current evaluation, conducted following 10 years of early psychosis group work, found there to be efficacy in family peer support groups and that it is important to provide family interventions in public early psychosis mental health services.

  13. The Effects of Group Play Therapy on Self-Concept Among 7 to 11 Year-Old Children Suffering From Thalassemia Major.

    Science.gov (United States)

    Tomaj, Ome Kolsoum; Estebsari, Fatemeh; Taghavi, Taraneh; Borim Nejad, Leili; Dastoorpoor, Maryam; Ghasemi, Afsaneh

    2016-04-01

    Children suffering from thalassemia have higher levels of depression and lower levels of self-concept. The aim of this study was to determine if group play therapy could significantly increase self-concept among children with thalassemia major ages 7 to 11 years old in teaching hospitals of Golestan province, Iran, in 2012. In this randomized, controlled clinical trial, 60 children with thalassemia major were randomly assigned to intervention (30 children) and control (30 children) groups. The intervention included eight 45 to 60 minute sessions during four weeks, during which the intervention group received group play therapy. The control group received no interventions. Self-concept was measured three times using the Piers-Harris children's self-concept scale: before, immediately after, and a month after the intervention. For the intervention group, results showed that the mean self-concept score was significantly higher at the second point in time compared to the baseline (P 0.05). The results showed that group play therapy improves self-concept in children suffering from thalassemia major.

  14. Three-dimensional preservation of cellular and subcellular structures suggests 1.6 billion-year-old crown-group red algae

    DEFF Research Database (Denmark)

    Bengtson, Stefan; Sallstedt, Therese; Belivanova, Veneta

    2017-01-01

    The ~1.6 Ga Tirohan Dolomite of the Lower Vindhyan in central India contains phosphatized stromatolitic microbialites. We report from there uniquely well-preserved fossils interpreted as probable crown-group rhodophytes (red algae). The filamentous form Rafatazmia chitrakootensis n. gen, n. sp. has....... The wider affinities of Denaricion are uncertain. Ramathallus lobatus n. gen., n. sp. is a lobate sessile alga with pseudoparenchymatous thallus, “cell fountains,” and apical growth, suggesting florideophycean affinity. If these inferences are correct, Rafatazmia and Ramathallus represent crown......-group multicellular rhodophytes, antedating the oldest previously accepted red alga in the fossil record by about 400 million years....

  15. A Web-Based, Social Networking Beginners’ Running Intervention for Adults Aged 18 to 50 Years Delivered via a Facebook Group: Randomized Controlled Trial

    Science.gov (United States)

    Boshoff, Kobie; Maher, Carol

    2018-01-01

    Background Online social networks continue to grow in popularity, with 1.7 billion users worldwide accessing Facebook each month. The use of social networking sites such as Facebook for the delivery of health behavior programs is relatively new. Objective The primary aim of this study was to determine the effectiveness of a Web-based beginners’ running program for adults aged 18 to 50 years, delivered via a Facebook group, in increasing physical activity (PA) and cardiorespiratory fitness. Methods A total of 89 adults with a mean age of 35.2 years (SD 10.9) were recruited online and via print media. Participants were randomly allocated to receive the UniSA Run Free program, an 8-week Web-based beginners’ running intervention, delivered via a closed Facebook group (n=41) that included daily interactive posts (information with links, motivational quotes, opinion polls, or questions) and details of the running sessions; or to the control group who received a hard copy of the running program (n=48). Assessments were completed online at baseline, 2 months, and 5 months. The primary outcome measures were self-reported weekly moderate to vigorous physical activity (MVPA) and objectively measured cardiorespiratory fitness. Secondary outcomes were social support, exercise attitudes, and self-efficacy. Analyses were undertaken using random effects mixed modeling. Compliance with the running program and engagement with the Facebook group were analyzed descriptively. Results Both groups significantly increased MVPA across the study period (P=.004); however, this was significantly higher in the Facebook group (P=.04). The Facebook group increased their MVPA from baseline by 140 min/week versus 91 min for the control at 2 months. MVPA remained elevated for the Facebook group (from baseline) by 129 min/week versus a 50 min/week decrease for the control at 5 months. Both groups had significant increases in social support scores at 2 months (P=.02); however, there were no group

  16. Diabetes mellitus and abnormal glucose tolerance development after gestational diabetes: A three-year, prospective, randomized, clinical-based, Mediterranean lifestyle interventional study with parallel groups.

    Science.gov (United States)

    Pérez-Ferre, Natalia; Del Valle, Laura; Torrejón, Maria José; Barca, Idoya; Calvo, María Isabel; Matía, Pilar; Rubio, Miguel A; Calle-Pascual, Alfonso L

    2015-08-01

    Women with prior gestational diabetes mellitus (GDM) have a high risk of developing type 2 diabetes mellitus (DM2) in later life. The study aim was to evaluate the efficacy of a lifestyle intervention for the prevention of glucose disorders (impaired fasting glucose, impaired glucose tolerance or DM2) in women with prior GDM. A total of 260 women with prior GDM who presented with normal fasting plasma glucose at six to twelve weeks postpartum were randomized into two groups: a Mediterranean lifestyle intervention group (n = 130) who underwent an educational program on nutrition and a monitored physical activity program and a control group (n = 130) with a conventional follow-up. A total of 237 women completed the three-year follow-up (126 in the intervention group and 111 in the control group). Their glucose disorders rates, clinical and metabolic changes and rates of adherence to the Mediterranean lifestyle were analyzed. Less women in the intervention group (42.8%) developed glucose disorders at the end of the three-year follow-up period compared with the control group (56.75%), p Lifestyle intervention was effective for the prevention of glucose disorders in women with prior GDM. Body weight gain and an unhealthy fat intake pattern were found to be the most predictive factors for the development of glucose disorders. Current Controlled trials: ISRCTN24165302. http://www.controlled-trials.com/isrctn/pf/24165302. Copyright © 2014 Elsevier Ltd and European Society for Clinical Nutrition and Metabolism. All rights reserved.

  17. Comparing yield and relative costs of WHO TB screening algorithms in selected risk groups among people aged 65 years and over in China, 2013.

    Directory of Open Access Journals (Sweden)

    Canyou Zhang

    Full Text Available To calculate the yield and cost per diagnosed tuberculosis (TB case for three World Health Organization screening algorithms and one using the Chinese National TB program (NTP TB suspect definitions, using data from a TB prevalence survey of people aged 65 years and over in China, 2013.This was an analytic study using data from the above survey. Risk groups were defined and the prevalence of new TB cases in each group calculated. Costs of each screening component were used to give indicative costs per case detected. Yield, number needed to screen (NNS and cost per case were used to assess the algorithms.The prevalence survey identified 172 new TB cases in 34,250 participants. Prevalence varied greatly in different groups, from 131/100,000 to 4651/ 100,000. Two groups were chosen to compare the algorithms. The medium-risk group (living in a rural area: men, or previous TB case, or close contact or a BMI <18.5, or tobacco user had appreciably higher cost per case (USD 221, 298 and 963 in the three algorithms than the high-risk group (all previous TB cases, all close contacts. (USD 72, 108 and 309 but detected two to four times more TB cases in the population. Using a Chest x-ray as the initial screening tool in the medium risk group cost the most (USD 963, and detected 67% of all the new cases. Using the NTP definition of TB suspects made little difference.To "End TB", many more TB cases have to be identified. Screening only the highest risk groups identified under 14% of the undetected cases,. To "End TB", medium risk groups will need to be screened. Using a CXR for initial screening results in a much higher yield, at what should be an acceptable cost.

  18. Buffer capacity of 4% succinylated gelatin does not provide any advantages over acidic 6% hydroxyethyl starch 130/0.4 for acid-base balance during experimental mixed acidaemia in a porcine model.

    Science.gov (United States)

    Esche, V; Russ, M; Melzer, S; Grossmann, B; Boemke, W; Unger, J K

    2008-11-01

    Four percent gelatine is an alkaline compound due to NH2 groups, whereas 6% hydroxyethyl starch 130/0.4 (HES130) has acidic features. We investigated whether these solutions lead to differences in acid-base balance in pigs during acidaemia and correction of pH. Anaesthetized pigs were randomized to HES130 or gelatine infusion (n = 5 per group). Animals received acid infusion (0.4 M solution of lactic acid and HCl diluted in normal saline) and low tidal volume ventilation (6-7 mL kg(-1), PaCO2 of 80-85 mmHg, pH 7.19-7.24). Measurements were made before and after induction of acidaemia, before and after correction of pH with haemofiltration (continuous venovenous haemofiltration) and tris-hydroxymethylaminomethane infusion. We measured parameters describing acid-base balance according to Stewart's approach, ketone body formation, oxygen delivery, haemodynamics, diuresis and urinary pH. Acid-base balance did not differ significantly between the groups. In HES130-treated pigs, the haemodilution-based drop of haemoglobin (1.4 +/- 1.0 g dL(-1), median +/- SD) was paralleled by an increase in the cardiac output (0.5 +/- 0.4 L min(-1). Lacking increases in cardiac output, gelatine-treated pigs demonstrated a reduction in oxygen delivery (149.4 +/- 106.0 mL min(-1)). Tris-hydroxymethylaminomethane volumes required for pH titration to desired values were significantly higher in the gelatine group (0.7 +/- 0.1 mL kg(-1) h(-1) vs. HES130: 0.5 +/- 0.2 mL kg(-1) h(-1)). The buffer capacity of gelatine did not lead to favourable differences in acid-base balance in comparison to HES130.

  19. Investigation of Jc-Suppressing Factors in Flat-Rolled Sr0.6K0.4Fe2As2Fe Tapes Via Microstructure Analysis

    KAUST Repository

    Zhang, Xianping; Wang, Qingxiao; Li, Kun; Cai, Yao; Jiang, Fuguo; Wang, Zhen; Li, Jianqi; Yao, Chao; Lin, He; Zhang, Qianjun; Dong, Chiheng; Wang, Dongliang; Zhang, Xixiang; Ma, Yanwei

    2015-01-01

    Pnictide superconductors will be very promising for applications if wires with high critical current density Jc can allow reel-to-reel large-scale fabrication at low costs. To understand the mechanism(s) that limited Jc in flat-rolled Sr0.6K0.4Fe2As

  20. Daily Living Skills at Your Fingertips. Daily Living Skills for 0-4 Level Adult Basic Education Students. Curriculum and Teacher Guide.

    Science.gov (United States)

    Greene, Margret

    A curriculum and teacher guide are provided for a program to teach daily living skills to 0-4 level adult basic education students. The guide presents a method of instruction and lists the materials provided. Teaching plans (content outlines) are provided for these areas: cooking, housekeeping, laundry, leisure skills, and medication awareness. A…

  1. Tamsulosin 0.4 mg once daily: effect on sexual function in patients with lower urinary tract symptoms suggestive of benign prostatic obstruction

    NARCIS (Netherlands)

    Höfner, K.; Claes, H.; de Reijke, T. M.; Folkestad, B.; Speakman, M. J.

    1999-01-01

    To evaluate the effect of tamsulosin, 0.4 mg once daily, on sexual function in comparison with placebo and alfuzosin, 2.5 mg three times daily, in patients with lower urinary tract symptoms (LUTS) suggestive of benign prostatic obstruction (BPO). Data from 830 patients randomized into three European

  2. Characters of alloy Zr-0.4%Mo-0.5%Fe-0.5%Cr post heat treatment and cold rolling

    International Nuclear Information System (INIS)

    Sungkono; Siti Aidah

    2014-01-01

    Research and development of Zr-Mo-Fe-Cr alloys aimed to obtain PWR fuel element structure material with high burn up. In this study of the Zr-0.4%Mo-0.5%Fe-0.5%Cr alloys was prepared from zirconium sponge, molybdenum, iron and chromium powder. The alloy were heat treated at varying temperatures of 650 and 750 °C and retention time of 1, 1.5 and 2 hours. The objectives of this research was to obtain effect of thickness reduction on the character of Zr-0.4%Mo-0.5%Fe-0.5%Cr alloy. The results of this experiment showed that the microstructures of Zr-0.4%Mo-0.5%Fe-0.5%Cr alloy after heat treatment and cold rolling exhibits that the higher of the thickness reduction has applied on the alloy caused the microstructure to evolve from deformed equiaxial grains into flat bar grains and then into deformed flat bar grains. However, the higher of the temperature and the retention time then the larger grain structures so that the cold rolling causes the shape of the grains structure into a flat bar with a relatively larger size which affects the lower hardness. The Zr-0.4%Mo-0.5%Fe-0.5%Cr alloy after heat treatment (650-750°C; 1.5-2 hours) can undergo cold deformation without cracking at a thickness reduction between 5 to 15%. (author)

  3. Hydroxyethyl starch 130/0.4 versus modified fluid gelatin for volume expansion in cardiac surgery patients: the effects on perioperative bleeding and transfusion needs

    NARCIS (Netherlands)

    van der Linden, Philippe J.; de Hert, Stefan G.; Deraedt, Dirk; Cromheecke, Stefanie; de Decker, Koen; de Paep, Rudi; Rodrigus, Inez; Daper, Anne; Trenchant, Anne

    2005-01-01

    In this prospective, randomized, open controlled study we compared the effects on net red blood cell loss of 6% hydroxyethyl starch 130/0.4 (HES: n = 64) and 3% modified fluid gelatin (GEL: n = 68) administered for intravascular volume management in patients undergoing coronary surgery. Blood losses

  4. Direct and indirect measurement of the magnetocaloric effect in a La0.6Ca0.4MnO3 ceramic perovskite

    DEFF Research Database (Denmark)

    Dinesen, A.R.; Linderoth, Søren; Mørup, Steen

    2002-01-01

    The adiabatic temperature change DeltaT(ad) due to a change of the external magnetic field (the magnetocaloric effect) for a perovskite-type La0.6Ca0.4MnO3 sample has been measured directly and indirectly (from the entropy change) and the results are compared. From the indirect method, involving...

  5. The Relationships Between Microstructure, Tensile Properties and Fatigue Life in Ti-5Al-5V-5Mo-3Cr-0.4Fe (Ti-5553)

    Science.gov (United States)

    Foltz, John W., IV

    beta-titanium alloys are being increasingly used in airframes as a way to decrease the weight of the aircraft. As a result of this movement, Ti-5Al-5V-5Mo-3Cr-0.4Fe (Timetal 555), a high-strength beta titanium alloy, is being used on the current generation of landing gear. This alloy features good combinations of strength, ductility, toughness and fatigue life in alpha+beta processed conditions, but little is known about beta-processed conditions. Recent work by the Center for the Accelerated Maturation of Materials (CAMM) research group at The Ohio State University has improved the tensile property knowledge base for beta-processed conditions in this alloy, and this thesis augments the aforementioned development with description of how microstructure affects fatigue life. In this work, beta-processed microstructures have been produced in a Gleeble(TM) thermomechanical simulator and subsequently characterized with a combination of electron and optical microscopy techniques. Four-point bending fatigue tests have been carried out on the material to characterize fatigue life. All the microstructural conditions have been fatigue tested with the maximum test stress equal to 90% of the measured yield strength. The subsequent results from tensile tests, fatigue tests, and microstructural quantification have been analyzed using Bayesian neural networks in an attempt to predict fatigue life using microstructural and tensile inputs. Good correlation has been developed between lifetime predictions and experimental results using microstructure and tensile inputs. Trained Bayesian neural networks have also been used in a predictive fashion to explore functional dependencies between these inputs and fatigue life. In this work, one section discusses the thermal treatments that led to the observed microstructures, and the possible sequence of precipitation that led to these microstructures. The thesis then describes the implications of microstructure on fatigue life and

  6. Fat-Free Mass and Fasting Glucose Values in Patients with and without Statin Therapy Assigned to Age Groups between 75 Years

    Directory of Open Access Journals (Sweden)

    Alexander Dzien

    2013-02-01

    Full Text Available Objective: The aging-associated changes in body composition result in an increased cardiometabolic risk. A tremendous reduction of cardiovascular morbidity and mortality can be obtained by statin therapy. Statins are well tolerated, with myopathy as the most serious negative side effect. Some recently published studies indicate that the incidence of type 2 diabetes might be increased during intensified statin therapy. The aim of our study was to investigate whether statin therapy has an influence on the aging-associated changes in fat-free mass (FFM. Methods: A total of 3,280 persons attending a medical outdoor center between January 2005 and July 2011 were assigned to 3 age groups from 75 years. Clinical data, body mass index (BMI, and body composition were evaluated in the different age groups in patients with and without statin therapy. To analyze the impact of statin use on FFM, we regressed a patient's FFM on an interaction term between statin use and age and other control variables. Results: Aging was associated with a decrease in BMI and FFM, while fat mass continuously increased up to the age of >75 years. This was paralleled by a continuous increase in fasting glucose levels in patients with and without statin therapy. The loss of FFM between the age group 75 years was more pronounced in statin-treated patients (10.88% than in non-statin users (8.47%. Creatine phosphokinase values revealed a decrease of 7.77 U/l between the age groups 75 years in non-statin users and of 14.75 U/l in statin users. Statistical analysis indicated that the effect of statin therapy on FFM is more pronounced in younger than in older patients. Conclusions: Patients under statin therapy seem to be more vulnerable to the aging-associated lowering of FFM. Diagnostic procedures and interventions to prevent a loss of muscle mass might be of particular advantage in elderly patients under statin therapy.

  7. Intravenous injection of gadobutrol in an epidemiological study group did not lead to a difference in relative signal intensities of certain brain structures after 5 years.

    Science.gov (United States)

    Kromrey, Marie-Luise; Liedtke, Kim Rouven; Ittermann, Till; Langner, Sönke; Kirsch, Michael; Weitschies, Werner; Kühn, Jens-Peter

    2017-02-01

    To investigate if application of macrocyclic gadolinium-based contrast agents in volunteers is associated with neuronal deposition detected by magnetic resonance imaging in a 5-year longitudinal survey. Three hundred eighty-seven volunteers who participated in a population-based study were enrolled. Subjects underwent plain T1-weighted brain MRI at baseline and 5 years later with identical sequence parameters. At baseline, 271 participants additionally received intravenous injection of the macrocyclic contrast agent gadobutrol (0.15 mmol/kg). A control group including 116 subjects received no contrast agent. Relative signal intensities of thalamus, pallidum, pons and dentate nucleus were compared at baseline and follow-up. No difference in relative signal intensities was observed between contrast group (thalamus, p = 0.865; pallidum, p = 0.263; pons, p = 0.533; dentate nucleus, p = 0.396) and control group (thalamus, p = 0.683; pallidum; p = 0.970; pons, p = 0.773; dentate nucleus, p = 0.232) at both times. Comparison between both groups revealed no significant differences in relative signal intensities (thalamus, p = 0.413; pallidum, p = 0.653; pons, p = 0.460; dentate nucleus, p = 0.751). The study showed no significant change in globus pallidus-to-thalamus or dentate nucleus-to-pons ratios. Five years after administration of a 1.5-fold dose gadobutrol to normal subjects, signal intensity of thalamus, pallidum, pons and dentate nucleus did not differ from participants who had not received gadobutrol. • Gadobutrol does not lead to neuronal signal alterations after 5 years. • Neuronal deposition of macrocyclic contrast agent could not be confirmed. • Macrocyclic contrast agents in a proven dosage are safe.

  8. The pilot and evaluation of a postnatal support group for Iraqi women in the year following the birth of their baby

    OpenAIRE

    Rooney, Rosanna M.; Kane, Robert T.; Wright, Bernadette; Gent, Vanessa; Di Ciano, Taralisa; Mancini, Vincent

    2014-01-01

    The current study involved conducting a pilot test of a culturally sensitive support group program developed to assist Iraqi women in the year following the birth of their baby (CSSG-B) in Perth, Western Australia. The aim of this study was to evaluate the social validity of the program. It was hypothesised that women involved in the program would find the program to be socially valid and culturally appropriate, and will also report lower levels of depressive symptomatology and higher levels ...

  9. Influence of synthesis route on morphology and electrical properties of LaNi{sub 0.6}Fe{sub 0.4}O{sub 3}

    Energy Technology Data Exchange (ETDEWEB)

    Bevilacqua, M.; Montini, T.; Tavagnacco, C.; Vicario, G.; Fornasiero, P.; Graziani, M. [Chemistry Department and Centre of Excellence for Nanostructured Materials, University of Trieste and INSTM (Italy)

    2006-11-15

    Recently LaNi{sub 1-x}Fe{sub x}O{sub 3} materials have been suggested as good candidates for cathodes for Intermediate Temperature Solid Oxide Fuel Cells. The electrical conductivity and the morphology of LaNi{sub 0.6}Fe{sub 0.4}O{sub 3} samples have been studied as a function of preparation route and calcination temperature. The conductivity, mainly electronic, strongly depends on the densification of the material, which is influenced by the preparation procedure. DFT calculations indicate that the conduction bands of LaNi{sub 0.6}Fe{sub 0.4}O{sub 3} are mainly made up of Fe and Ni 3d states and that there is a small bandwidth (2.3 eV) around the Fermi level. Moreover, a small polaron mechanism for the electronic conduction in this material is suggested by the simulations. Three different preparation methods have been investigated: the glycine-nitrate process, the gel-citrate complexation route and the coprecipitation route. The glycine-nitrate synthesis produces non-homogenous LaNi{sub 0.6}Fe{sub 0.4}O{sub 3} materials. Good specific conductivity is obtained only after high temperature treatments that homogenise and sinter the material. The gel-citrate complexation route leads to homogenous LaNi{sub 0.6}Fe{sub 0.4}O{sub 3} samples, which however are resistant to sinterization/densification. Finally, homogenous LaNi{sub 0.6}Fe{sub 0.4}O{sub 3} is obtained with coprecipitation synthesis. This synthesis is particularly promising since the morphology of the obtained precipitate favours the sinterization at low temperatures. These temperatures are low enough to prevent the undesirable reaction with ZrO{sub 2}-based electrolyte. (author)

  10. First-order differential-delay equation for the baroreflex predicts the 0.4-Hz blood pressure rhythm in rats.

    Science.gov (United States)

    Burgess, D E; Hundley, J C; Li, S G; Randall, D C; Brown, D R

    1997-12-01

    We have described a 0.4-Hz rhythm in renal sympathetic nerve activity (SNA) that is tightly coupled to 0.4-Hz oscillations in blood pressure in the unanesthetized rat. In previous work, the relationship between SNA and fluctuations in mean arterial blood pressure (MAP) was described by a set of two first-order differential equations. We have now modified our earlier model to test the feasibility that the 0.4-Hz rhythm can be explained by the baroreflex without requiring a neural oscillator. In this baroreflex model, a linear feedback term replaces the sympathetic drive to the cardiovascular system. The time delay in the feedback loop is set equal to the time delay on the efferent side, approximately 0.5 s (as determined in the initial model), plus a time delay of 0.2 s on the afferent side for a total time delay of approximately 0.7 s. A stability analysis of this new model yields feedback resonant frequencies close to 0.4 Hz. Because of the time delay in the feedback loop, the proportional gain may not exceed a value on the order of 10 to maintain stability. The addition of a derivative feedback term increases the system's stability for a positive range of derivative gains. We conclude that the known physiological time delay for the sympathetic portion of the baroreflex can account for the observed 0.4-Hz rhythm in rat MAP and that the sensitivity of the baroreceptors to the rate of change in blood pressure, as well as average blood pressure, would enhance the natural stability of the baroreflex.

  11. Group therapy for somatization disorders in primary care: maintenance of treatment goals of short cognitive-behavioural treatment one-and-a-half-year follow-up.

    Science.gov (United States)

    Lidbeck, J

    2003-06-01

    The objective of this study was to evaluate the maintenance of treatment goals of a short cognitive-behavioural group treatment programme for the management of somatization disorders in primary care. In a previous controlled 6-month follow-up study, patients with somatization disorders (n=32) improved with respect to illness and somatic preoccupation, hypochondriasis, and medication usage. In the present report the same group of patients were also investigated one-and-a-half year after initial treatment. The long-term follow-up manifested maintained improvement with respect to hypochondriasis. There was additional reduction of anxiety and psychosocial preoccupation, whereas somatization and depression-anxiety scores improved progressively. A short cognitive-behavioural group treatment of psychosomatic patients can be useful in primary care and may manifest maintained or progressive beneficial outcome.

  12. Group cognitive behavioral therapy for patients with generalized social anxiety disorder in Japan: outcomes at 1-year follow up and outcome predictors

    Directory of Open Access Journals (Sweden)

    Kawaguchi A

    2013-02-01

    Full Text Available Akiko Kawaguchi,1 Norio Watanabe,1 Yumi Nakano,2 Sei Ogawa,1 Masako Suzuki,1 Masaki Kondo,1 Toshi A Furukawa,3 Tatsuo Akechi11Department of Psychiatry and Cognitive-Behavioral Medicine, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan; 2Sugiyama Jogakuen University School of Human Sciences, Nisshin, Japan; 3Department of Health Promotion and Human Behavior, Kyoto University Graduate School of Medicine/School of Public Health, Kyoto, JapanBackground: Social anxiety disorder (SAD is one of the most common psychiatric disorders worldwide. Cognitive behavioral therapy (CBT is an effective treatment option for patients with SAD. In the present study, we examined the efficacy of group CBT for patients with generalized SAD in Japan at 1-year follow-up and investigated predictors with regard to outcomes.Methods: This study was conducted as a single-arm, naturalistic, follow-up study in a routine Japanese clinical setting. A total of 113 outpatients with generalized SAD participated in group CBT from July 2003 to August 2010 and were assessed at follow-ups for up to 1 year. Primary outcome was the total score on the Social Phobia Scale/Social Interaction Anxiety Scale (SPS/SIAS at 1 year. Possible baseline predictors were investigated using mixed-model analyses.Results: Among the 113 patients, 70 completed the assessment at the 1-year follow-up. The SPS/SIAS scores showed significant improvement throughout the follow-ups for up to 1 year. The effect sizes of SPS/SIAS at the 1-year follow-up were 0.68 (95% confidence interval 0.41–0.95/0.76 (0.49–1.03 in the intention-to-treat group and 0.77 (0.42–1.10/0.84 (0.49–1.18 in completers. Older age at baseline, late onset, and lower severity of SAD were significantly associated with good outcomes as a result of mixed-model analyses.Conclusions: CBT for patients with generalized SAD in Japan is effective for up to 1 year after treatment. The effect sizes were as large as those in

  13. Comparative Study of Probiotic Ice Cream and Probiotic Drink on Salivary Streptococcus mutans Levels in 6-12 Years Age Group Children.

    Science.gov (United States)

    Mahantesha, Taranatha; Reddy, K M Parveen; Kumar, N H Praveen; Nara, Asha; Ashwin, Devasya; Buddiga, Vinutna

    2015-09-01

    Dental caries is one of the most common health problems in the world. Probiotics are one the various preventive methods to reduce dental caries. The aim of this study is to compare the effectiveness of probiotic ice cream and drink on salivary Streptococcus mutans levels in children of 6-12 years age group. A three phase study was carried out in children (n = 50) of 6-12 years age with zero decayed missing filled teeth (dmft)/DMFT. They were randomly divided into two equal groups. Saliva samples were collected before the consumptions of probiotic ice cream and probiotic drink. Colony count obtained was recorded as baseline data. For both groups probiotic ice cream and drink was given randomly for 7 days and a washout period of 90 days were given and then the saliva samples were collected and colony counting was done. Statistical analysis was performed using Student's paired t-test and multiple comparisons by Tukey's honest significant difference test which showed, there is a significant reduction in salivary S. mutans level in both groups after 7 days period. However, after washout period only probiotic ice cream showed reduction whereas drink did not. Also, there was no significant difference between probiotic ice cream and drink. Probiotic organisms definitely have a role in reducing the salivary S. mutans level and ice cream would be a better choice than drink. However, the prolonged use of the agents and their effects on caries is still to be determined.

  14. Mixed-carbon-coated LiMn_0_._4Fe_0_._6PO_4 nanopowders with excellent high rate and low temperature performances for lithium-ion batteries

    International Nuclear Information System (INIS)

    Zou, Bang-Kun; Wang, He-Yang; Qiang, Zi-Yue; Shao, Yu; Sun, Xin; Wen, Zhao-Yin; Chen, Chun-Hua

    2016-01-01

    Graphical abstract: Ascorbic acid acts as both an antioxidant and a surfactant to form organic groups (first carbon source) on the surface of as-solvothermal products, in which the −OH (or H_2O) groups of glucose (second carbon source) are closely bonded to the surface to form a uniform adsorption layer. Uniform mixed-carbon-coated LiMn_0_._4Fe_0_._6PO_4 nanopowders are formed after calcination, which demonstrate excellent electrochemical performances. - Highlights: • Ascorbic acid acts as both an antioxidant and a first-time carbon coating source. • Reaction mechanisms of the synthesis are carefully studied. • Mixed-carbon-coated LiMn_0_._4Fe_0_._6PO_4 nanopowders process excellent high rate and low temperature performances. - Abstract: A novel solvothermal approach with ascorbic acid as both an antioxidant and a first-time carbon coating source is developed to synthesize LiMn_0_._4Fe_0_._6PO_4 nano-particles with a uniform particle size distribution around 150 nm. A calcination step for the second-time carbon coating and further crystallization is adopted following the solvothermal step. The structures and electrochemical properties of the obtained samples are studied by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Raman spectroscopy, Fourier transformation infrared, Infrared carbon-sulfur analyzer and galvanostatic cell cycling. Ascorbic acid plays a crucial role in the formation of uniform carbon layer and nano-particles. Compared with single-carbon-coated LiMn_0_._4Fe_0_._6PO_4 without adding ascorbic acid, the mixed-carbon-coated LiMn_0_._4Fe_0_._6PO_4 shows much better electrochemical performance. It can deliver specific capacities of 154.8 and 128.5 mAh g"−"1 at 1C and 20C, respectively, at 25 °C. Even at −20 °C, its specific capacities are 106.6 and 68.8 mAh g"−"1 at 0.2C and 5C, respectively.

  15. [Longitudinal study of intelligence quotient of a group of Dominican children who had experienced third degree malnutrition in their first two years of life].

    Science.gov (United States)

    Castillo Ariza, M; Gonzalez Sanchez, M; Reyes Baez, J F; Ariza Castillo, M

    1988-01-01

    Intelligence quotients (IQs) were measured in 15 children hospitalized in their 1st 2 years with 3rd degree malnutrition and in their siblings of closest age who had no history of hospitalization for malnutrition. Clinical records were reviewed of 459 malnourished infants admitted to the Dr. Robert Reid Cabral Hospital in Santo Domingo between January 1976-January 1977. 230 of the children had died, and 15 of the 57 survivors who returned to the hospital for a preliminary interview were selected as subjects. Their closely aged siblings served as controls. Both groups were given Bender's visual-motor test and Weschler's intelligence scale for children. The ages of the subjects were 7-0 years and of siblings 6-13 years. Children who had spent a greater number of days in the hospital appeared to have a greater degree of mental impairment. 2 of the children with marasmus presented moderate mental retardation, 1 slight retardation, and another borderline retardation. The controls for these 5 cases included 1 moderately retarded, 2 slightly retarded, and 1 borderline case. 1 child with marasmus who was removed from his home showed a normal intelligence while his control who had remained in the home had a slight retardation. There was no consistent relationship between the cephalic perimeter and the IQ score, although 40% of the malnourished children and 30% of controls had perimeters below the normal range. 20% of cases and no controls required more than 18 months to learn to walk. Cases were also slower than controls to begin speaking and to be toilet trained. The tests showed that the control group members had somewhat higher intelligence quotients than the malnourished group. 53.2% of the malnourished children had IQs far below normal at 60-69, compared to 39.9% of controls. 93% of the study group and 87% of controls had IQs below normal values of 80-89. But there was no statistically significant difference in average IQs: 72.2 + or - 17.5 in the study group and 75

  16. Baseline fatty acids, food groups, a diet score and 50-year all-cause mortality rates. An ecological analysis of the Seven Countries Study.

    Science.gov (United States)

    Menotti, Alessandro; Kromhout, Daan; Puddu, Paolo Emilio; Alberti-Fidanza, Adalberta; Hollman, Peter; Kafatos, Anthony; Tolonen, Hanna; Adachi, Hisashi; Jacobs, David R

    2017-12-01

    This analysis deals with the ecologic relationships of dietary fatty acids, food groups and the Mediterranean Adequacy Index (MAI, derived from 15 food groups) with 50-year all-cause mortality rates in 16 cohorts of the Seven Countries Study. A dietary survey was conducted at baseline in cohorts subsamples including chemical analysis of food samples representing average consumptions. Ecologic correlations of dietary variables were computed across cohorts with 50-year all-cause mortality rates, where 97% of men had died. There was a 12-year average age at death population difference between extreme cohorts. In the 1960s the average population intake of saturated (S) and trans (T) fatty acids and hard fats was high in the northern European cohorts while monounsaturated (M), polyunsaturated (P) fatty acids and vegetable oils were high in the Mediterranean areas and total fat was low in Japan. The 50-year all-cause mortality rates correlated (r= -0.51 to -0.64) ecologically inversely with the ratios M/S, (M + P)/(S + T) and vegetable foods and the ratio hard fats/vegetable oils. Adjustment for high socio-economic status strengthened (r= -0.62 to -0.77) these associations including MAI diet score. The protective fatty acids and vegetable oils are indicators of the low risk traditional Mediterranean style diets. KEY MESSAGES We aimed at studying the ecologic relationships of dietary fatty acids, food groups and the Mediterranean Adequacy Index (MAI, derived from 15 food groups) with 50-year all-cause mortality rates in the Seven Countries Study. The 50-year all-cause mortality rates correlated (r = -0.51 to -0.64) ecologically inversely with the ratios M/S [monounsaturated (M) + polyunsaturated (P)]/[saturated (S) + trans (T)] fatty acids and vegetable foods and the ratio hard fats/vegetable oils. After adjustment for high socio-economic status, associations with the ratios strengthened (r = -0.62 to -0.77) including also the MAI diet score

  17. Pattern of injury mortality by age-group in children aged 0–14 years in Scotland, 2002–2006, and its implications for prevention

    Directory of Open Access Journals (Sweden)

    Stone David H

    2009-04-01

    Full Text Available Abstract Background Knowledge of the epidemiology of injuries in children is essential for the planning, implementation and evaluation of preventive measures but recent epidemiological information on injuries in children both in general and by age-group in Scotland is scarce. This study examines the recent pattern of childhood mortality from injury by age-group in Scotland and considers its implications for prevention. Methods Routine mortality data for the period 2002–2006 were obtained from the General Register Office for Scotland and were analysed in terms of number of deaths, mean annual mortality rates per 100,000 population, leading causes of death, and causes of injury death. Mid-year population estimates were used as the denominator. Chi-square tests were used to determine statistical significance. Results 186 children aged 0–14 died from an injury in Scotland during 2002–06 (MR 4.3 per 100,000. Injuries were the leading cause of death in 1–14, 5–9 and 10–14 year-olds (causing 25%, 29% and 32% of all deaths respectively. The leading individual causes of injury death (0–14 years were pedestrian and non-pedestrian road-traffic injuries and assault/homicide but there was variation by age-group. Assault/homicide, fire and suffocation caused most injury deaths in young children; road-traffic injuries in older ones. Collectively, intentional injuries were a bigger threat to the lives of under-15s than any single cause of unintentional injury. The mortality rate from assault/homicide was highest in infants ( Conclusion Injuries continue to be a leading cause of death in childhood in Scotland. Variation in causes of injury death by age-group is important when targeting preventive efforts. In particular, the threats of assault/homicide in infants, fire in 1–4 year-olds, pedestrian injury in 5–14 year-olds, and suicide in 10–14 year-olds need urgent consideration for preventive action.

  18. Two-year impact of community-based health screening and parenting groups on child development in Zambia: Follow-up to a cluster-randomized controlled trial.

    Science.gov (United States)

    Rockers, Peter C; Zanolini, Arianna; Banda, Bowen; Chipili, Mwaba Moono; Hughes, Robert C; Hamer, Davidson H; Fink, Günther

    2018-04-01

    Early childhood interventions have potential to offset the negative impact of early adversity. We evaluated the impact of a community-based parenting group intervention on child development in Zambia. We conducted a non-masked cluster-randomized controlled trial in Southern Province, Zambia. Thirty clusters of villages were matched based on population density and distance from the nearest health center, and randomly assigned to intervention (15 clusters, 268 caregiver-child dyads) or control (15 clusters, 258 caregiver-child dyads). Caregivers were eligible if they had a child 6 to 12 months old at baseline. In intervention clusters, caregivers were visited twice per month during the first year of the study by child development agents (CDAs) and were invited to attend fortnightly parenting group meetings. Parenting groups selected "head mothers" from their communities who were trained by CDAs to facilitate meetings and deliver a diverse parenting curriculum. The parenting group intervention, originally designed to run for 1 year, was extended, and households were visited for a follow-up assessment at the end of year 2. The control group did not receive any intervention. Intention-to-treat analysis was performed for primary outcomes measured at the year 2 follow-up: stunting and 5 domains of neurocognitive development measured using the Bayley Scales of Infant and Toddler Development-Third Edition (BSID-III). In order to show Cohen's d estimates, BSID-III composite scores were converted to z-scores by standardizing within the study population. In all, 195/268 children (73%) in the intervention group and 182/258 children (71%) in the control group were assessed at endline after 2 years. The intervention significantly reduced stunting (56/195 versus 72/182; adjusted odds ratio 0.45, 95% CI 0.22 to 0.92; p = 0.028) and had a significant positive impact on language (β 0.14, 95% CI 0.01 to 0.27; p = 0.039). The intervention did not significantly impact cognition (β 0

  19. Two-year impact of community-based health screening and parenting groups on child development in Zambia: Follow-up to a cluster-randomized controlled trial.

    Directory of Open Access Journals (Sweden)

    Peter C Rockers

    2018-04-01

    Full Text Available Early childhood interventions have potential to offset the negative impact of early adversity. We evaluated the impact of a community-based parenting group intervention on child development in Zambia.We conducted a non-masked cluster-randomized controlled trial in Southern Province, Zambia. Thirty clusters of villages were matched based on population density and distance from the nearest health center, and randomly assigned to intervention (15 clusters, 268 caregiver-child dyads or control (15 clusters, 258 caregiver-child dyads. Caregivers were eligible if they had a child 6 to 12 months old at baseline. In intervention clusters, caregivers were visited twice per month during the first year of the study by child development agents (CDAs and were invited to attend fortnightly parenting group meetings. Parenting groups selected "head mothers" from their communities who were trained by CDAs to facilitate meetings and deliver a diverse parenting curriculum. The parenting group intervention, originally designed to run for 1 year, was extended, and households were visited for a follow-up assessment at the end of year 2. The control group did not receive any intervention. Intention-to-treat analysis was performed for primary outcomes measured at the year 2 follow-up: stunting and 5 domains of neurocognitive development measured using the Bayley Scales of Infant and Toddler Development-Third Edition (BSID-III. In order to show Cohen's d estimates, BSID-III composite scores were converted to z-scores by standardizing within the study population. In all, 195/268 children (73% in the intervention group and 182/258 children (71% in the control group were assessed at endline after 2 years. The intervention significantly reduced stunting (56/195 versus 72/182; adjusted odds ratio 0.45, 95% CI 0.22 to 0.92; p = 0.028 and had a significant positive impact on language (β 0.14, 95% CI 0.01 to 0.27; p = 0.039. The intervention did not significantly impact

  20. Sexual risk attitudes and intentions of youth aged 12-14 years: survey comparisons of parent-teen prevention and control groups.

    Science.gov (United States)

    Lederman, Regina P; Chan, Wenyaw; Roberts-Gray, Cynthia

    2004-01-01

    In this study, the authors compared differences in sexual risk attitudes and intentions for three groups of youth (experimental program, n = 90; attention control, n = 80; and nonparticipant control, n = 634) aged 12-14 years. Two student groups participated with their parents in programs focused on strengthening family interaction and prevention of sexual risks, HIV, and adolescent pregnancy. Surveys assessed students' attitudes and intentions regarding early sexual and other health-risk behaviors, family interactions, and perceived parental disapproval of risk behaviors. The authors used general linear modeling to compare results. The experimental prevention program differentiated the total scores of the 3 groups (p < .05). A similar result was obtained for student intentions to avoid sex (p < .01). Pairwise comparisons showed the experimental program group scored higher than the nonparticipant group on total scores (p < .01) and on students' intention to avoid sex (p < .01). The results suggest this novel educational program involving both parents and students offers a promising approach to HIV and teen pregnancy prevention.

  1. The pilot and evaluation of a postnatal support Group for Iraqi Women in the year following the birth of their baby

    Directory of Open Access Journals (Sweden)

    Vanessa eGent

    2014-01-01

    Full Text Available The current study involved conducting a pilot test of a culturally sensitive support group program developed to assist Iraqi women in the year following the birth of their baby (CSSG-B in Perth, Western Australia. The aim of this study was to evaluate the social validity of the program. It was hypothesised that women involved in the program would find the program to be socially valid and culturally appropriate, and will also report lower levels of depressive symptomatology and higher levels of social support, following the group intervention. Participants were twelve Iraqi Arabic speaking women, who had a child less than 12 months of age. The program was based on Iraqi women's explanatory models (Kleinman, 1978; Di Ciano, Rooney, Wright, Hay, & Robinson, 2010 of the birth and motherhood experience. Social validity ratings were obtained during the implementation of the program in order to assess the level of acceptability of the intervention. A one-group pretest-posttest design was used to determine if depressive symptoms had decreased during the course of the intervention and social support had increased. Results indicated that Iraqi Arabic speaking women found the support group intervention acceptable and relevant and there was a significant decrease in scores on the Edinburgh Postnatal Depression scale from pretest to posttest. These results that the culturally sensitive group intervention was culturally acceptable and was associated with decreased levels of depressive symptomatology.

  2. Intravenous injection of gadobutrol in an epidemiological study group did not lead to a difference in relative signal intensities of certain brain structures after 5 years

    Energy Technology Data Exchange (ETDEWEB)

    Kromrey, Marie-Luise; Liedtke, Kim Rouven; Langner, Soenke; Kirsch, Michael; Kuehn, Jens-Peter [University Medicine Greifswald, Institute of Diagnostic Radiology and Neuroradiology, Greifswald (Germany); Ittermann, Till [University Medicine Greifswald, Institute for Community Medicine, Greifswald (Germany); Weitschies, Werner [University Greifswald, Institute of Biopharmacy and Pharmaceutical Technology, Greifswald (Germany)

    2017-02-15

    To investigate if application of macrocyclic gadolinium-based contrast agents in volunteers is associated with neuronal deposition detected by magnetic resonance imaging in a 5-year longitudinal survey. Three hundred eighty-seven volunteers who participated in a population-based study were enrolled. Subjects underwent plain T1-weighted brain MRI at baseline and 5 years later with identical sequence parameters. At baseline, 271 participants additionally received intravenous injection of the macrocyclic contrast agent gadobutrol (1.5 mmol/kg). A control group including 116 subjects received no contrast agent. Relative signal intensities of thalamus, pallidum, pons and dentate nucleus were compared at baseline and follow-up. No difference in relative signal intensities was observed between contrast group (thalamus, p = 0.865; pallidum, p = 0.263; pons, p = 0.533; dentate nucleus, p = 0.396) and control group (thalamus, p = 0.683; pallidum; p = 0.970; pons, p = 0.773; dentate nucleus, p = 0.232) at both times. Comparison between both groups revealed no significant differences in relative signal intensities (thalamus, p = 0.413; pallidum, p = 0.653; pons, p = 0.460; dentate nucleus, p = 0.751). The study showed no significant change in globus pallidus-to-thalamus or dentate nucleus-to-pons ratios. Five years after administration of a 1.5-fold dose gadobutrol to normal subjects, signal intensity of thalamus, pallidum, pons and dentate nucleus did not differ from participants who had not received gadobutrol. (orig.)

  3. A Randomized Controlled Trial of Group Coping-Oriented Therapy vs Supportive Therapy in Schizophrenia: Results of a 2-Year Follow-up.

    Science.gov (United States)

    Schaub, Annette; Mueser, Kim T; von Werder, Thomas; Engel, Rolf; Möller, Hans-Jürgen; Falkai, Peter

    2016-07-01

    Over the past 30 years, illness management programs and cognitive-behavioral therapy for psychosis have gained prominence in the treatment of schizophrenia. However, little is known about the long-term benefits of these types of programs when delivered during inpatient treatment following a symptom exacerbation. To evaluate this question, we conducted a randomized controlled trial comparing the long-term effects of a group-based coping-oriented program (COP) that combined the elements of illness management with cognitive behavioral-therapy for psychosis, with an equally intensive supportive therapy (SUP) program. 196 inpatients with DSM-IV schizophrenia were randomized to COP or SUP, each lasting 12 sessions provided over 6-8 weeks. Outcome measures were collected in the hospital at baseline and post-assessment, and following discharge into the community 1 and 2 years later. We compared the groups on rehospitalizations, symptoms, psychosocial functioning, and knowledge about psychosis. Intent-to-treat analyses indicated that patients in COP learned significantly more information about psychosis, and had greater reductions in overall symptoms and depression/anxiety over the treatment and follow-up period than patients in SUP. Patients in both groups improved significantly in other symptoms and psychosocial functioning. There were no differences between the groups in hospitalization rates, which were low. People with schizophrenia can benefit from short-term COPs delivered during the inpatient phase, with improvements sustaining for 2 years following discharge from the hospital. More research is needed to evaluate the long-term impact of coping-oriented and similar programs provided during inpatient treatment. © The Author 2016. Published by Oxford University Press on behalf of the Maryland Psychiatric Research Center. All rights reserved. For permissions, please email: journals.permissions@oup.com.

  4. Prevalence of post-traumatic stress disorder and depression in two groups of children one year after the January 2010 earthquake in Haiti.

    Science.gov (United States)

    Blanc, Judite; Bui, Eric; Mouchenik, Yoram; Derivois, Daniel; Birmes, Philippe

    2015-02-01

    More than 500 studies were conducted in Haiti following the January 12 of 2010 earthquake, yet few of them assessed mental health of the population. To our knowledge, none targeted the effectiveness of various methods used to treat survivors, whether adults or children Our study aimed to assess one year after the disaster, the effect of a specific psycho-social support offered to relocated children in Port-au-Prince compared with a control group. The two groups were homogeneous in the intensity of the peritraumatic distress they experienced. We were unable to show a significant difference between both in the average scores for PTSD, nor for depression, nor in three out of the four sub-scales of the Child Behavior Check-List. In case children, 68% and 40.9%, respectively, and 50% and 20.5% of the control group, reported severe levels of the symptoms of PTSD and depression. These surprising results can be explained by the absence of equivalence in the two groups from a socio-demographic point of view and because subjects were not randomly selected in the recruitment process. This study has not made it possible to indicate the effectiveness of a specific psycho-social support offered to children in the aftermath of the disaster. On the other hand, the sample illustrates the high prevalence (more than 50% for PTSD) of severe post-traumatic stress in this group of school-age children, one year after the earthquake. These results indicate that serious attention should be paid to the mental health aspects in reconstruction program for the country. Copyright © 2014 Elsevier B.V. All rights reserved.

  5. Quality of Life From Canadian Cancer Trials Group MA.17R: A Randomized Trial of Extending Adjuvant Letrozole to 10 Years.

    Science.gov (United States)

    Lemieux, Julie; Brundage, Michael D; Parulekar, Wendy R; Goss, Paul E; Ingle, James N; Pritchard, Kathleen I; Celano, Paul; Muss, Hyman; Gralow, Julie; Strasser-Weippl, Kathrin; Whelan, Kate; Tu, Dongsheng; Whelan, Timothy J

    2018-02-20

    Purpose MA.17R was a Canadian Cancer Trials Group-led phase III randomized controlled trial comparing letrozole to placebo after 5 years of aromatase inhibitor as adjuvant therapy for hormone receptor-positive breast cancer. Quality of life (QOL) was a secondary outcome measure of the study, and here, we report the results of these analyses. Methods QOL was measured using the Short Form-36 (SF-36; two summary scores and eight domains) and menopause-specific QOL (MENQOL; four symptom domains) at baseline and every 12 months up to 60 months. QOL assessment was mandatory for Canadian Cancer Trials Group centers but optional for centers in other groups. Mean change scores from baseline were calculated. Results One thousand nine hundred eighteen women were randomly assigned, and 1,428 women completed the baseline QOL assessment. Compliance with QOL measures was > 85%. Baseline summary scores for the SF-36 physical component summary (47.5 for letrozole and 47.9 for placebo) and mental component summary (55.5 for letrozole and 54.8 for placebo) were close to the population norms of 50. No differences were seen between groups in mean change scores for the SF-36 physical and mental component summaries and the other eight QOL domains except for the role-physical subscale. No difference was found in any of the four domains of the MENQOL Conclusion No clinically significant differences were seen in overall QOL measured by the SF-36 summary measures and MENQOL between the letrozole and placebo groups. The data indicate that continuation of aromatase inhibitor therapy after 5 years of prior treatment in the trial population was not associated with a deterioration of overall QOL.

  6. Two-year follow-up study of a group-based diabetes medical nutrition therapy and motivational interviewing intervention among African American women

    Directory of Open Access Journals (Sweden)

    Miller ST

    2017-04-01

    Full Text Available Stephania T Miller,1 Sylvie A Akohoue2 1Department of Surgery, 2Department of Family and Community Medicine, Meharry Medical College, Nashville, TN, USA Objectives: To assess the 2-year efficacy of a combined medical nutrition therapy and motivational interviewing (MI pilot study intervention and factors that influenced long-term dietary self-care.Research design and methods: Pilot study participants, African American women with type 2 diabetes, completed a 2-year follow-up study visit, including clinical assessments and completion of a dietary self-care questionnaire and a semi-structured interview. Wilcoxon signed-rank tests were used to evaluate differences between baseline and 2-year follow-up clinical and dietary self-care outcomes. Hierarchical coding was used to analyze semi-structured interviews and categorize facilitator and barrier themes into subthemes. Subthemes were quantified based on the number of subtheme-related comments. Results: Among the 12 participants (mean age 57.1±5.7 years, improvements were observed for HbA1c (baseline: 10.25%; interquartile range [IQR]: 8.10, 11.72 and follow-up: 8.8%; IQR: 7.48,10.22, systolic blood pressure (baseline: 142 mm Hg; IQR: 134.25, 157.25 and follow-up: 127 mm Hg; IQR: 113.5, 143.25, frequency of eating high-fat foods (baseline: 3.5 days; IQR: 2.75, 4.25 and follow-up: 3 days; IQR: 2.5, 4.5, and of spacing carbohydrates throughout the day (baseline: 3 days; IQR: 3.0, 4.0 and follow-up: 4 days; IQR: 1.5, 4.5. There was a statistically significant decrease (p=0.04 in the frequency of fruit and vegetable intake (baseline: 4 days; IQR: 3.75, 7.0 and follow-up: 3.5 days; IQR: 2.75, 4.0. Dietary self-care barriers and facilitators included internal (eg, motivation and external factors (eg, social support. Motivation (70 comments and lack of motivation (67 comments were the most pervasive facilitator and barrier subthemes, respectively. Conclusion: Overall, diabetes-related clinical and dietary

  7. Electrical and optical properties of a kind of ferroelectric oxide films comprising of PbZr0.4Ti0.6O3 stacks

    Science.gov (United States)

    Li, Shimin; Ma, Guohong; Wang, Chao; Zhao, Wenchao; Chen, Xiaoshuang; Chu, Junhao; Dai, Ning; Shi, Wangzhou; Hu, Gujin

    2017-07-01

    A type of ferroelectric oxide films, consisting of three PbZr0.4Ti0.6O3 stacks with different periodic thicknesses, has been designed and fabricated on F-doped transparent conductive tin oxide substrates by using one single precursor solution and spinning-coating process. These films exhibit superior ferroelectric, dielectric, and optical performance. Each PbZr0.4Ti0.6O3 multilayer has a high reflectivity band with ˜110 nm photonic band width and average reflectivity of >80%, a dielectric constant of 530 and dielectric tunability of ˜28% at 1 MHz, a remnant polarization of 36 μC/cm2, and a polarization loss of cycles, rendering their perspective application in photonic band-gap engineering, microwave tunable devices, and integrated optoelectronics.

  8. Angle-resolved environmental X-ray photoelectron spectroscopy: A new laboratory setup for photoemission studies at pressures up to 0.4 Torr

    International Nuclear Information System (INIS)

    Mangolini, F.; Wabiszewski, G. E.; Egberts, P.; Åhlund, J.; Backlund, K.; Karlsson, P. G.; Adiga, V. P.; Streller, F.; Wannberg, B.; Carpick, R. W.

    2012-01-01

    The paper presents the development and demonstrates the capabilities of a new laboratory-based environmental X-ray photoelectron spectroscopy system incorporating an electrostatic lens and able to acquire spectra up to 0.4 Torr. The incorporation of a two-dimensional detector provides imaging capabilities and allows the acquisition of angle-resolved data in parallel mode over an angular range of 14° without tilting the sample. The sensitivity and energy resolution of the spectrometer have been investigated by analyzing a standard Ag foil both under high vacuum (10 −8 Torr) conditions and at elevated pressures of N 2 (0.4 Torr). The possibility of acquiring angle-resolved data at different pressures has been demonstrated by analyzing a silicon/silicon dioxide (Si/SiO 2 ) sample. The collected angle-resolved spectra could be effectively used for the determination of the thickness of the native silicon oxide layer.

  9. Absorbed Dose Distributions in Small Copper Wire Insulation due to Multiple-Sided Irradiations by 0.4 MeV Electrons

    DEFF Research Database (Denmark)

    Miller, Arne; McLaughlin, W. L.; Pedersen, Walther Batsberg

    1979-01-01

    When scanned electron beams are used to crosslink polymeric insulation of wire and cable, an important goal is to achieve optimum uniformity of absorbed dose distributions. Accurate measurements of dose distributions in a plastic dosimeter simulating a typical insulating material (polyethylene......) surrounding a copper wire core show that equal irradiations from as few as four sides give approximately isotropy and satisfactorily uniform energy depositions around the wire circumference. Electron beams of 0.4 MeV maximum energy were used to irradiate wires having a copper core of 1.0 mm dia....... and insulation thicknesses between 0.4 and 0.8 mm. The plastic dosimeter simulating polyethylene insulations was a thin radiochromic polyvinyl butyral film wrapped several times around the copper wire, such that when unwrapped and analyzed optically on a scanning microspectrophotometer, high-resolution radial...

  10. Electronic structure of (La,Sr)2CuO4 and Ba0.6K0.4BiO3

    International Nuclear Information System (INIS)

    Howell, R.H.; Sterne, P.A.; Fluss, M.J.; Kaiser, J.H.; Kitazawa, K.; Kojima, H.; Mosley, W.D.; Dykes, J.W.; Shelton, R.N.

    1995-01-01

    We have measured and calculated the electron-positron momentum distribution of La 2-x Sr x CuO 4 samples for Sr concentrations of 0, 0.1,0.13, and 0.2 and Ba 0.6 K 0.4 BiO 3 . The momentum distribution of all samples contained features derived from the overlap of the positron distribution with the valence electrons. In addition, discontinuities typical of a Fermi surface are seen in the superconducting samples. The form and position of these features are in general agreement with band theory for both La 2-x Sr x CuO 4 and Ba 0.6 K 0.4 BiO 3 . However the evolution of the Fermi surface with doping in La 2-x Sr x CuO 4 differed significantly from expectations based on single electron band theories. (orig.)

  11. Quantitative dissolution of (U, Pu)O2 MOX (0.4% to 44% PuO2) using microwave heating technique

    International Nuclear Information System (INIS)

    Malav, R.K.; Fulzele, Ajit K.; Prakash, Amrit; Afzal, Md.; Panakkal, J.P.

    2011-01-01

    AFFF has fabricated the (U, Pu)O 2 mixed oxide fuels for PHWRs, BWRs, PFBRs and FBTRs. The quantitative dissolution of the fuel samples are required within time for accurate determination of uranium-plutonium in chemical quality control laboratory. This paper describes the use of microwave heating technique in quantitative dissolution of (U, Pu)O 2 MOX (from 0.4% to 44% PuO 2 ). (author)

  12. Earth's crust and heat flow in the Fossa Brandanica, Southern Italy. [0. 4 to 2. 2. mu. cal/cm/sup 2//sec

    Energy Technology Data Exchange (ETDEWEB)

    Mongelli, F; Ricchetti, G

    1970-01-01

    A detailed study has been made of the Fossa Bradanica by means of seven shallow boreholes drilled in the clays. The observed gradients together with the results of in-situ thermal conductivity measurements indicate the heat flow as being between 0.4 and 2.2 ..mu..cal/cm/sup 2/ . sec. The influence of geographic and geological factors is discussed. The results obtained are not incompatible with crustal structures indicated by other geophysical methods.

  13. Alloying behavior and deformation twinning in a CoNiFeCrAl0.6Ti0.4 high entropy alloy processed by spark plasma sintering

    International Nuclear Information System (INIS)

    Fu, Zhiqiang; Chen, Weiping; Fang, Sicong; Zhang, Dayue; Xiao, Huaqiang; Zhu, Dezhi

    2013-01-01

    Highlights: ► CoNiFeCrAl 0.6 Ti 0.4 high entropy alloy has been synthesized via MA and SPS. ► Deformation twinning possibly occurred during MA or SPS. ► This alloy exhibits excellent mechanical properties. ► The fracture mechanism of this alloy is intergranular fracture and plastic fracture. -- Abstract: Inequi-atomic CoNiFeCrAl 0.6 Ti 0.4 high entropy alloy has been designed and fabricated by mechanical alloying (MA) and spark plasma sintering (SPS). Alloying behavior, microstructure, phase evolution and mechanical properties of CoNiFeCrAl 0.6 Ti 0.4 alloy were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscope (TEM), as well as by an Instron testing system. During MA, a supersaturated solid solution consisting of a FCC phase and a metastable BCC phase was formed. Two FCC phases (named FCC1 and FCC2) and a new BCC phase were observed after SPS. During SPS, the metastable BCC phase transformed into the FCC2 phase and the new BCC phase. Meanwhile, the FCC1 phase was the initial FCC phase which was formed during MA. Moreover, nanoscale twins obviously presented only in partial FCC1 phase after SPS. Deformation twinning may be occurred during MA or SPS. The sintered alloy with a high relative density of 98.83% exhibits excellent comprehensive mechanical properties. The yield stress, compressive strength, compression ratio and Vickers hardness of the alloy are 2.08, 2.52 GPa, 11.5% and 573 H V , respectively. The fracture mechanism of CoNiFeCrAl 0.6 Ti 0.4 high entropy alloy is mainly performed at intergranular fracture and plastic fracture mode

  14. AN OBSERVATIONAL STUDY OF CHANGING EPIDEMIOLOGICAL TRENDS IN INCIDENCE OF PEPTIC PERFORATION IN AGE GROUP 15-45 YEARS IN M. Y. HOSPITAL, INDORE

    Directory of Open Access Journals (Sweden)

    Devendra Chouhan

    2016-07-01

    Full Text Available AIM To investigate the recent change in epidemiology of benign peptic perforation in young adults. METHODS This is a prospective population-based single centre observational study of all patients diagnosed with benign perforated peptic ulcer; included were both gastric and duodenal ulcer patients admitted to Maharaja Yeshwantrao Hospital, Indore, between September 2013 and September 2015. Ulcers with a malignant neoplasia diagnosis verified by histology after biopsy, traumatic perforation, and perforation of age group >45 and 40 years, the incidence increased over 4 times and mortality more than 12 times compared to younger age <20 years. After 1 month followup, out of 172 discharged patients, 145 (84% patients came with symptoms resolved or having no complication. After 2 months followup, 158 (92% patients came with symptoms resolved and 166 (96% patients changed their dietary habits and lifestyle. CONCLUSION The incidence rate and mortality rate was stable. In our study, we found male preponderance, may be due to their lifestyle changes. Maximum number patients are found in age group 41-45 years. As in all previous studies, as age advances, incidence of peptic perforation also increases. Also, found strong relationship between consumption of oily or spicy food and non-vegetarian food with incidence of peptic perforation. Relation of peptic perforation with NSAIDs, smoking, and alcoholism follows same trends as in previous studies.

  15. Corrosion effect on the electrochemical properties of LaNi3.55Mn0.4Al0.3Co0.75 and LaNi3.55Mn0.4Al0.3Fe0.75 negative electrodes used in Ni-MH batteries

    International Nuclear Information System (INIS)

    Khaldi, Chokri; Boussami, Sami; Rejeb, Borhene Ben; Mathlouthi, Hamadi; Lamloumi, Jilani

    2010-01-01

    The thermodynamic parameters, electrochemical capacity, equilibrium potential and the equilibrium pressure, of LaNi 3.55 Mn 0.4 Al 0.3 Co 0.75 and LaNi 3.55 Mn 0.4 Al 0.3 Fe 0.75 alloys have been evaluated from the electrochemical isotherms (C/30 and OCV methods) and CV technique. A comparative study has been done between the parameter values deduced from the electrochemical methods and the solid-gas method. The parameter values deduced from the electrochemical methods are influenced by the electrochemical corrosion of the alloys in aqueous KOH electrolyte. The corrosion behaviour of the LaNi 3.55 Mn 0.4 Al 0.3 Co 0.75 and LaNi 3.55 Mn 0.4 Al 0.3 Fe 0.75 electrodes after activation was investigated using the method of the potentiodynamic polarization. The variation of current and potential corrosion values with the state of charge (SOC) show that the substitution of cobalt by iron accentuates the corrosion process. The high-rate dischargeability (HRD) of the LaNi 3.55 Mn 0.4 Al 0.3 Co 0.75 and LaNi 3.55 Mn 0.4 Al 0.3 Fe 0.75 alloys was examined. By increasing the discharge current the (HRD) decrease linearly for both the alloys and for the LaNi 3.55 Mn 0.4 Al 0.3 Fe 0.75 compound is greater then for the LaNi 3.55 Mn 0.4 Al 0.3 Co 0.75 one.

  16. Synthesis and characterization of binary (CuO)0.6(CeO2)0.4 nanoparticles via a simple heat treatment method

    Science.gov (United States)

    Baqer, Anwar Ali; Matori, Khamirul Amin; Al-Hada, Naif Mohammed; Shaari, Abdul Halim; Kamari, Halimah Mohamed; Saion, Elias; Chyi, Josephine Liew Ying; Abdullah, Che Azurahanim Che

    2018-06-01

    A binary (CuO)0.6 (CeO2)0.4 nanoparticles were prepared via thermal treatment method, using copper nitrate, cerium nitrate as precursors, PVP as capping agent and de-ionized water as a solvent. The structures, morphology, composition of the element and optical properties of these nanoparticles have been studied under different temperatures using various techniques. The XRD spectrum of the samples at 500 °C and above confirmed the existence of both monoclinic (CuO) and cubic fluorite (CeO2) structures. The findings of FESEM and TEM exhibited the average practical size and agglomeration increment with an elevation in the calcination temperature. The synthesized nanoparticles were also characterized by FTIR, which indicated the formation of binary Cu-O and Ce-O bonds. The EDX analysis was performed to indicate the chemical composition of the sample. The double energy band gaps of (CuO)0.6(CeO2)0.4 reduction with rising calcination temperature, can be referred to the enhancement of the crystallinity of the samples. PL intensity of (CuO)0.6(CeO2)0.4 nanoparticles peaks, which increased with the elevation of the calcination temperature to 800 °C was observed from the PL spectrum; this was due to the increment of the particle size that occurred.

  17. [Successful cyclosporine treatment in 2 patients with refractory CIDP, involving monitoring of both AUC(0-4h) and trough levels].

    Science.gov (United States)

    Takeuchi, Akiko; Shirai, Shinichi; Horiuchi, Kazuhiro; Takahashi, Ikuko; Matsushima, Masaaki; Hirotani, Makoto; Kano, Takahiro; Yabe, Ichiro; Matumoto, Akihisa; Sasaki, Hidenao

    2012-01-01

    Cyclosporine A (CYA) treatment has been reported to be probably useful for patients with chronic inflammatory demyelinating polyradiculoneuropathy (CIDP) that is resistant to conventional treatment. Although several studies have shown that appropriate area under the concentration-time curve (AUC) monitoring of CYA levels results in improved outcomes for refractory nephrotic syndrome patients, the importance of using AUC analysis for CIDP remains unclear. In this study, we measured both trough and AUC from 0 to 4 h (AUC(0-4 h)) levels of CYA in 2 patients with CIDP and compared the findings for the clinical parameters. On the basis of the CYA dosing recommendations for patients with nephrotic syndrome, we used a CYA concentration of 150 ng/ml for the trough level and an AUC(0-4 h) value of 2,500 ng/(ml·h). Patient 1 showed a significant increase in grip strength and a prolonged remission period. Patient 2 showed improvement in the modified Rankin scale and manual muscle test (MMT) scores. Monitoring both AUC(0-4 h) and trough levels of CYA seems to be a better option than monitoring the trough level alone because it leads to improved estimation of the efficacy and safety of CYA treatment in the case of CIDP patients.

  18. A giant enhancement of CMR in Eu{sub 0.6}Ca{sub 0.4}B{sub 6}

    Energy Technology Data Exchange (ETDEWEB)

    Glushkov, V V; Bogach, A V; Demishev, S V; Sluchanko, N E [A.M.Prokhorov General Physics Institute of RAS, 38, Vavilov str., Moscow 119991 (Russian Federation); Anisimov, M A [Moscow Institute of Physics and Technology, 9, Institutskii per., Dolgoprudny, Moscow Region 141700 (Russian Federation); Churkin, O A; Kuznetsov, A V [Moscow Engineering Physics Institute, 31, Kashirskoe Shosse, Moscow 115409 (Russian Federation); Filipov, V B; Levchenko, A V; Shitsevalova, N Yu [I. Frantsevich Institute for Problems of Materials Science NAS, 3, Krzhyzhanovsky str., Kiev 03680 (Ukraine); Flachbart, K, E-mail: glushkov@lt.gpi.r [Centre of Low Temperature Physics, IEP SAS and IPS FS UPJS, Kosice SK-04001 (Slovakia)

    2010-01-15

    The transport and magnetic properties of Eu{sub 0.6}Ca{sub 0.4}B{sub 6} single crystals have been studied at temperatures 1.8-300 K in magnetic fields up to 80 kOe. It was found that lowering of temperature results in a drastic increase of magnetoresistance up to the values of {rho}(0)/{rho}(H){approx}7{center_dot}10{sup 5} detected below 6K. The Hall and Seebeck effect measurements showed that colossal magnetoresistance (CMR) observed in Eu{sub 0.6}Ca{sub 0.4}B{sub 6} is accompanied by a crossover from hole-like to electron-like regime of charge transport induced by applied magnetic field. Hall mobility values {mu}{sub H{approx}}200-350 cm{sup 2}/(Vs) estimated for the high conductive state of Eu{sub 0.6}Ca{sub 0.4}B{sub 6} in the presence of strong substitutional disorder were proved to be comparable with these ones measured for undoped EuB{sub 6}. The anomalous behaviour of transport and magnetic parameters is discussed in terms of metal-insulator transition earlier predicted for this low carrier density system within double exchange model by V M Pereira et al., Phys. Rev. Lett. 93 147202 (2004).

  19. The Evaluation of Hydroxyethyl Starch (6% HES 130/0.4 Solution’s Potential Preventive Effects on Coagulation Status in Women with Gynecologic Malignancies Using Rotation Thromboelastography

    Directory of Open Access Journals (Sweden)

    Meltem Olga Akay

    2014-09-01

    Full Text Available OBJECTIVE: The aim of this study was to determine the effects of in vitro hemodilution with 6% hydroxyethyl starch (HES 130/0.4 solution on the coagulation status of women with gynecologic malignancies by using rotation thromboelastogram (ROTEM®. METHODS: Twenty-two patients with gynecological tumors scheduled for anesthesia were enrolled. Blood samples were diluted by 20% with 6% HES (130/0.4 solution. RESULTS: In the INTEM assay, clotting time (CT (p<0.01 and clot formation time (CFT (p<0.001 were significantly increased and maximum maximum clot formation (MCF (p< 0.001 was significantly decreased in HES hemodilution compared with the undiluted control samples. In the EXTEM assay, there was a similar significant increase in increase in CFT (p<0.01 and a decrease in maximum a decrease in MCF (p<0.01 in HES hemodilution when compared with control samples. CONCLUSION: HES 130/0.4 solution causes significant hypocoagulable changes in the thromboelastographic profile of gynecologic cancer patients in vitro.

  20. Development needs of the electricity market. Final report by the working group on the five-year revision of the electricity market act

    International Nuclear Information System (INIS)

    2001-01-01

    The opening of the Finnish electricity market was started by the Electricity Market Act that entered into force in 1995. The Act abolished the obstructions to competition in electricity production, foreign trade and sales. To guarantee the functioning of the electricity market in practice, the electricity network operators were obliged to gradually open up their networks for the use of other parties operating on the market. Finland has liberated her electricity market in the forefront and ahead of the prescribed time in relation to the obligations laid down in the EC Directive concerning common rules for the internal market in electricity. The working group has studied the development needs of the electricity market in the light of experience gained during the validity of the Electricity Market Act. As a general conclusion, the working group states that the Finnish electricity market is functioning in an appropriate manner and that there is no reason to essentially change the model chosen for the opening of the electricity market. The working group makes several proposals for actions and recommendations for improving the efficiency of the electricity market. According to the view of the working group, electricity users, production plants and distribution network operators should be authorised to construct a 110-440 kV connection line of their own to a 110 kV network or grid. Following the working group's proposal, the regulation concerning electricity retailers would be extended over to electricity vendors operating as retailers in a real-estate network. To guarantee the functioning of competition on the small-scale consumers' electricity market, the working group suggests that the customers would be entitled during one year to one change of vendor for which no separate fee would be collected. The working group proposes that construction authorisation conditions pertaining to border lines should be specified so that one condition for granting an authorisation would

  1. Two hundred years of palaeontological discovery: Review of research on the Early to Middle Devonian Bokkeveld Group (Cape Supergroup) of South Africa

    Science.gov (United States)

    Penn-Clarke, C. R.; Rubidge, B. S.; Jinnah, Z. A.

    2018-01-01

    Documentation of the palaeontological heritage of the Early to Middle Devonian Bokkeveld Group of South Africa has been recorded as far back as the early nineteenth century with the arrival of the first European settlers, merchants and explorers to the Cape region. Anecdotal evidence suggests that indigenous peoples had knowledge of fossils in the Bokkeveld Group from as early as the Middle-to-Late Stone Age. Within the first hundred years of the expansion of the Cape Colony the first geological maps of the Bokkeveld Group were produced alongside the first description of fossils as well as their Devonian age and marine origin. These early investigations provided a foundation for establishing faunal endemism common to South Africa, South America and the Falkland Islands. During the early twentieth century considerable progress was made in the description of fossil fauna of the Bokkeveld Group, most notably of invertebrates and plants. This research demonstrated that invertebrate fossils from the Bokkeveld Group, as well as those from time equivalents in South America and the Falkland Islands, were distinct from the Devonian Period elsewhere (e.g. Europe and North America). The role of fossils from the Bokkeveld Group proved critical in the formal designation and delineation of a broad region of endemism, the Malvinokaffric Realm that persisted at high subpolar-to-polar palaeolatitudes in southwestern Gondwana and extended from South Africa, Bolivia, Brazil, Argentina, Antarctica and the Falkland Islands with possible elements in Guinea-Bissau, Senegal and Ghana during the Emsian-Eifelian Stages. In the latter half of the twentieth century developments in understanding the sedimentology and stratigraphy of the Bokkeveld Group lead to the premise that the succession accumulated in a storm-and-wave dominated deltaic palaeoenvironment, and enabled inferences on the palaeoecology of the fossil taxa. During this period detailed revisions of numerous invertebrate and plant

  2. Group-based parent-training programmes for improving emotional and behavioural adjustment in children from birth to three years old.

    Science.gov (United States)

    Barlow, Jane; Smailagic, Nadja; Ferriter, Michael; Bennett, Cathy; Jones, Hannah

    2010-03-17

    Emotional and behavioural problems in children are common. Research suggests that parenting has an important role to play in helping children to become well-adjusted, and that the first few months and years are especially important. Parenting programmes may have a role to play in improving the emotional and behavioural adjustment of infants and toddlers. This review is applicable to parents and carers of children up to three years eleven months although some studies included children up to five years old. To:a) establish whether group-based parenting programmes are effective in improving the emotional and behavioural adjustment of children three years of age or less (i.e. maximum mean age of 3 years 11 months); b) assess the role of parenting programmes in the primary prevention of emotional and behavioural problems. We searched CENTRAL, MEDLINE, EMBASE, CINAHL, PsycINFO, Sociofile, Social Science Citation Index, ASSIA, National Research Register (NRR) and ERIC. The searches were originally run in 2000 and then updated in 2007/8. Randomised controlled trials of group-based parenting programmes that had used at least one standardised instrument to measure emotional and behavioural adjustment. The results for each outcome in each study have been presented, with 95% confidence intervals. Where appropriate the results have been combined in a meta-analysis using a random-effects model. Eight studies were included in the review. There were sufficient data from six studies to combine the results in a meta-analysis for parent-reports and from three studies to combine the results for independent assessments of children's behaviour post-intervention. There was in addition, sufficient information from three studies to conduct a meta-analysis of both parent-report and independent follow-up data. Both parent-report (SMD -0.25; CI -0.45 to -0.06), and independent observations (SMD -0.54; CI -0.84 to -0.23) of children's behaviour produce significant results favouring the

  3. [FEATURES OF CONSTITUTIONAL CHARACTERISTICS OF YOUNG MALES AGED OF 17-20 YEARS, NATIVES OF THE BAIKAL REGION WITH REGARD TO THEIR FUNCTIONAL GROUPS OF HEALTH].

    Science.gov (United States)

    Kolokoltsev, M M

    2016-01-01

    The study of somatotypes of the constitution is an important point in planning of the improvements of measures among the population in various regions of Russia. The purpose of the work was to reveal features of age dynamics of somatotypes of the constitution in students of youthful age of the Baikal Region by means of somatotyping according to scheme by Nikityuk B. A. and Kozlova A.I (1990) with taking into account their functional group of health. There were examined 1286 Slavic young males, natives of the Irkutsk region, aged of 17-20 years, from them, according to data of the medical examination 996 were referred to the 1st (main) and 290--to the 2nd (preparatory) functional group of health for physical exercises. There were established significant differences in somatotypes of the constitution in young men of the 1st and 2nd functional groups of health. In both functional groups there is noted a significant amount of young males with transitional somatotypes that testifies to incompleteness of growth processes of their organism. The obtained results of a somatotyping are used in the educational process for a training individualization on physical culture of students of IRGTU, and also in construction of independent physical--improving programs.

  4. Five years' experience of transverse groin incision for femoral artery access in arterial reconstructive surgery: parallel observational longitudinal group comparison study.

    LENUS (Irish Health Repository)

    Beirne, Christopher

    2008-07-01

    Vertical groin incisions (VGIs) have been used to access femoral vessels, but reports allude to wound complications. Our aim was to compare VGI with transverse groin incision (TGI) for femoral artery exposure. Over a 5-year interval, 196 patients with 284 femoral artery exposures for supra- and infrainguinal procedures were studied. Primary endpoints were surgical skin site wound infection, seroma, haematoma formation, and major lower limb amputation. Secondary endpoints were graft patency, wound paresthesias, and length of hospital stay. There were 160 TGIs and 124 VGIs. The demographics and risk factor profile were not statistically different between groups. Seroma developed in 4.4% of TGIs and 13.7% of VGIs (p= .005). The complicated skin and soft tissue infection rate was five times greater with VGI (p= .001). The VGI group had a significantly higher rate of major amputation (p= .0005). Significantly higher graft failure rates were observed in the VGI group (p= .011). No paresthesia was reported in any TGI wound. The mean hospital stay was also significantly shorter in the TGI group (p= .006). The study data support and expound on the theory that an alternative incision to VGI offers lower short- and long-term morbidity. Our findings sustain the selection of the TGI in femoral artery surgery for both supra- and infrainguinal procedures without compromise of vessel exposure.

  5. A Web-Based, Social Networking Beginners' Running Intervention for Adults Aged 18 to 50 Years Delivered via a Facebook Group: Randomized Controlled Trial.

    Science.gov (United States)

    Looyestyn, Jemma; Kernot, Jocelyn; Boshoff, Kobie; Maher, Carol

    2018-02-26

    Online social networks continue to grow in popularity, with 1.7 billion users worldwide accessing Facebook each month. The use of social networking sites such as Facebook for the delivery of health behavior programs is relatively new. The primary aim of this study was to determine the effectiveness of a Web-based beginners' running program for adults aged 18 to 50 years, delivered via a Facebook group, in increasing physical activity (PA) and cardiorespiratory fitness. A total of 89 adults with a mean age of 35.2 years (SD 10.9) were recruited online and via print media. Participants were randomly allocated to receive the UniSA Run Free program, an 8-week Web-based beginners' running intervention, delivered via a closed Facebook group (n=41) that included daily interactive posts (information with links, motivational quotes, opinion polls, or questions) and details of the running sessions; or to the control group who received a hard copy of the running program (n=48). Assessments were completed online at baseline, 2 months, and 5 months. The primary outcome measures were self-reported weekly moderate to vigorous physical activity (MVPA) and objectively measured cardiorespiratory fitness. Secondary outcomes were social support, exercise attitudes, and self-efficacy. Analyses were undertaken using random effects mixed modeling. Compliance with the running program and engagement with the Facebook group were analyzed descriptively. Both groups significantly increased MVPA across the study period (P=.004); however, this was significantly higher in the Facebook group (P=.04). The Facebook group increased their MVPA from baseline by 140 min/week versus 91 min for the control at 2 months. MVPA remained elevated for the Facebook group (from baseline) by 129 min/week versus a 50 min/week decrease for the control at 5 months. Both groups had significant increases in social support scores at 2 months (P=.02); however, there were no group by time differences (P=.16). There were

  6. Utilization of the ART approach in a group of public oral health operators in South Africa: a 5-year longitudinal study

    Directory of Open Access Journals (Sweden)

    Frencken Jo E

    2009-04-01

    Full Text Available Abstract Background A significant increase in the proportion of restorations to the number of tooth extractions was reported after the introduction of ART in an academic mobile dental service in South Africa. The changes were ascribed to its less threatening procedure. Based on these findings, ART was subsequently introduced into the public oral health service of Ekurhuleni district in the South African province of Gauteng. This article reports on the 5-year restorative treatment pattern of operators in the Ekurhuleni district, who adopted the ART approach into their daily dental practice. Methods Of the 21 trained operators, 11 had placed more than 10% of restorations using ART at year 1 and were evaluated after 5 years. Data, including number of restored and extracted teeth and type of restoration, were drawn from clinical records 4 months before, and up to 5 years after training. The restoration/extraction ratio (REX score and the proportion of ART restorations to the total number of restorations were calculated. The paired sample t-test and linear regression analysis were applied. Results The mean percentage of ART restorations after 1 year was 24.0% (SE 7.2 and significantly increased annually to 42.7% (SE 9.2 after 5 years in permanent dentitions. In primary dentitions the mean percentage of ART restorations after 1 year was 80.6% (SE 4.9 and 72.6% (SE 8.8 after 5 years. The mean REX score before ART training was 0.08 (SE 0.03 and 0.07 (SE 0.04 for permanent and primary teeth, respectively and 0.11 (SE 0.03 and 0.17 (SE 0.05 after 5 years. Conclusion Five years after training, ART had been used consistently in this selected group of operators as the predominant restorative treatment used for primary teeth and showed a significant annual increase in permanent teeth. However, this change had not resulted in an increase in the REX score in both dentitions.

  7. Ag doped (Bi1.6Pb0.4Sr2CaCu2O8+δ textured rods

    Directory of Open Access Journals (Sweden)

    Díez, J. C.

    2008-06-01

    Full Text Available In this work, superconducting samples of (Bi1.6Pb0.4Sr2CaCu2O8+δ with Ag additions have been studied. (Bi1.6Pb0.4Sr2CaCu2O8+δ + x wt.% Ag (with x = 0, 1 and 3 powders were synthesized using a sol-gel method. The obtained powders were used as precursors to fabricate long textured cylindrical bars through a floating zone melting method. A drastic change on the microstructure has been found when comparing with undoped Bi2Sr2CaCu2O8+δ samples. The results showed that electrical resistivity at room temperature, critical current as well as flexural strength are improved when Ag is added to these Pb doped samples, while critical temperature does not change. On the other hand, it has been found that samples with composition (Bi1.6Pb0.4Sr2CaCu2O8+δ + Ag shown E-I curves with very high sharpness values on the zone of the superconducting to normal transition, reaching n-values (E∼In as high as 45 at 65K.Se han preparado polvos cerámicos de composición (Bi1.6Pb0.4Sr2CaCu2O8+δ + x % Ag en peso (con x = 0, 1 y 3 mediante un proceso sol-gel. Estos polvos se han utilizado para fabricar precursores que se texturaron por medio del método de fusión zonal flotante. Se ha encontrado un gran cambio en la microestructura cuando se compara con muestras de composición pura Bi2Sr2CaCu2O8+δ. Tanto la resistividad eléctrica a temperatura ambiente, como la corriente crítica, así como la resistencia a flexión se mejoran cuando la Ag se adiciona a estas muestras dopadas con Pb, mientras que no se observa cambio en la temperatura crítica. Por otra parte, se ha encontrado que las muestras de composición (Bi1.6Pb0.4Sr2CaCu2O8+δ + Ag presentan una gran pendiente de la curva E-I en la zona de transición entre el estado superconductor y el estado normal. Con estas composiciones, se han encontrado valores de n (E∼In de hasta 45 a 65K.

  8. Quality of Life From Canadian Cancer Trials Group MA.17R: A Randomized Trial of Extending Adjuvant Letrozole to 10 Years

    Science.gov (United States)

    Brundage, Michael D.; Parulekar, Wendy R.; Goss, Paul E.; Ingle, James N.; Pritchard, Kathleen I.; Celano, Paul; Muss, Hyman; Gralow, Julie; Strasser-Weippl, Kathrin; Whelan, Kate; Tu, Dongsheng; Whelan, Timothy J.

    2018-01-01

    Purpose MA.17R was a Canadian Cancer Trials Group–led phase III randomized controlled trial comparing letrozole to placebo after 5 years of aromatase inhibitor as adjuvant therapy for hormone receptor–positive breast cancer. Quality of life (QOL) was a secondary outcome measure of the study, and here, we report the results of these analyses. Methods QOL was measured using the Short Form-36 (SF-36; two summary scores and eight domains) and menopause-specific QOL (MENQOL; four symptom domains) at baseline and every 12 months up to 60 months. QOL assessment was mandatory for Canadian Cancer Trials Group centers but optional for centers in other groups. Mean change scores from baseline were calculated. Results One thousand nine hundred eighteen women were randomly assigned, and 1,428 women completed the baseline QOL assessment. Compliance with QOL measures was > 85%. Baseline summary scores for the SF-36 physical component summary (47.5 for letrozole and 47.9 for placebo) and mental component summary (55.5 for letrozole and 54.8 for placebo) were close to the population norms of 50. No differences were seen between groups in mean change scores for the SF-36 physical and mental component summaries and the other eight QOL domains except for the role-physical subscale. No difference was found in any of the four domains of the MENQOL Conclusion No clinically significant differences were seen in overall QOL measured by the SF-36 summary measures and MENQOL between the letrozole and placebo groups. The data indicate that continuation of aromatase inhibitor therapy after 5 years of prior treatment in the trial population was not associated with a deterioration of overall QOL. PMID:29328860

  9. Commentary on 'Behavioural and cognitive-behavioural group-based parenting programmes for early-onset conduct problems in children aged 3 to 12 years'.

    Science.gov (United States)

    Haroon, Munib

    2013-03-07

    This is a commentary on a Cochrane review, published in this issue of EBCH, first published as: Furlong M, McGilloway S, Bywater T, Hutchings J, Smith SM, Donnelly M. Behavioural and cognitive-behavioural group-based parenting programmes for early-onset conduct problems in children aged 3 to 12 years. Cochrane Database of Systematic Reviews 2012, Issue 2. Art. No.: CD008225. DoI: 10.1002/14651858.CD008225.pub2. Copyright © 2013 The Cochrane Collaboration. Published by John Wiley & Sons, Ltd.

  10. Waste Area Group 10, Operable Unit 10-08, Remedial Investigation/Feasibility Study Annual Status Report for Fiscal Year 2006

    Energy Technology Data Exchange (ETDEWEB)

    R. P. Wells

    2007-05-09

    This report provides a status of the progress made in Fiscal Year 2006 on tasks identified in the Waste Area Group 10, Operable Unit 10-08, Remedial Investigation/Feasibility Study Work Plan. Major accomplishments include: (1) groundwater sampling and review of the groundwater monitoring data, (2) installation of a Sitewide groundwater-level monitoring network, (3) update of the Groundwater Monitoring and Field Sampling Plan of Operable Unit 10-08, (4) re-evaluation of the risk at Site TSF-08, (5) progress on the Operable Unit 10-08 Sitewide Groundwater Model.

  11. Magnetic resonance imaging, radiography, and scintigraphy of the finger joints: one year follow up of patients with early arthritis. The TIRA Group

    DEFF Research Database (Denmark)

    Klarlund, Mette; Østergaard, Mikkel; Jensen, K E

    2000-01-01

    OBJECTIVES: To evaluate synovial membrane hypertrophy, tenosynovitis, and erosion development of the 2nd to 5th metacarpophalangeal (MCP) and proximal interphalangeal (PIP) joints by magnetic resonance imaging in a group of patients with rheumatoid arthritis (RA) or suspected RA followed up for one......, and tenosynovitis score. RESULTS: MRI detected progression of erosions earlier and more often than did radiography of the same joints; at baseline the MRI to radiography ratio was 28:4. Erosions were exclusively found in patients with RA at baseline or fulfilling the ACR criteria at one year. At one year follow up......, scores of MR synovial membrane hypertrophy, tenosynovitis, and scintigraphic tracer accumulation had not changed significantly from baseline; in contrast, swollen and tender joint counts had declined significantly (p

  12. Evolution of fragment-species production in comet C/2012 S1 (ISON) from 1.6 au to 0.4 au

    Science.gov (United States)

    McKay, A.; Cochran, A.; Dello Russo, N.; Weaver, H.; Vervack, R.; Harris, W.; Kawakita, H.; DiSanti, M.; Chanover, N.; Tsvetanov, Z.

    2014-07-01

    The chemical composition of cometary ices is among the most primitive in the Solar System. For this reason, studies of cometary composition are important for constraining planetary formation models. Because the best way to characterize the chemical composition of the cometary population as a whole is through remote-sensing spectroscopy of volatiles in the gas phase, it is paramount that the coma physics and chemistry responsible for the observed emissions are understood. Comet C/2012 S1 (ISON) provided an unprecedented opportunity to study coma physics and chemistry for a sun-grazing comet. Owing to its early discovery, observations of ISON could be planned well in advance of its close perihelion passage at only 2.7 solar radii. Although it did not survive perihelion (and therefore observations of how the comet's composition changed after exposure to the harsh near-Sun environment were not possible), observations of the coma composition evolution with decreasing heliocentric distance were possible throughout the pre-perihelion observing window. We present high-spectral-resolution optical spectroscopy of ISON obtained pre-perihelion in October and November 2013, spanning a heliocentric distance range of 1.6--0.4 au. We obtained high-resolution optical spectroscopy throughout ISON's pre-perihelion leg using three instruments: HIRESb on the Keck I telescope on Mauna Kea in Hawaii, ARCES on the Apache Point Observatory 3.5-meter telescope in Sunspot, NM, and the 2DCoude on the 2.7-meter Harlan J. Smith Telescope at McDonald Observatory. All these spectrographs provide high spectral resolution (R=30,000--60,000). This enables several avenues of analysis not possible at lower spectral resolution, such as analysis of the forbidden oxygen lines at 5577, 6300, and 6364 Angstroms, and ortho-para ratios in NH_2. We report detections of many species in our spectral data set, including CN, C_2, C_3, CH, NH_2, [OI], NH, and OH (OH and NH are only detected with HIRES because

  13. Vitamin A status of the minority ethnic group of Karen hill tribe children aged 1-6 years in Northern Thailand.

    Science.gov (United States)

    Tienboon, Prasong; Wangpakapattanawong, Prasit

    2007-01-01

    Vitamin A deficiency (VAD) is the most common cause of childhood blindness in the developing world. It is estimated that by giving adequate vitamin A, in vitamin A deficient populations, child mortality from measles can be reduced by 50%, and mortality from diarrheal disease by 40%. Overall mortality in children 6-59 months of age can be reduced by 23%. This paper reported results from a study of vitamin A status and malnutrition of the minority ethnic group of Karen hill tribe children aged 1-6 years in the north of Thailand. All children aged 1-6 years (N = 158; 83 boys, 75 girls) from the three Karen villages (Mae Hae Tai, Mae Yot, Mae Raek) of Mae Chaem district in the north of Thailand were studied. The Karen is the largest mountain ethnic minority ("hill tribe") group in Thailand. All children were examined by a qualified medical doctor and were assessed for their vitamin A intakes using 24 hours dietary recall. Thai food composition table from Ministry of Health, Thailand were used as references. The results were compared with the Thai Recommended Dietary Allowances. Children aged 1-3 years and 4-6 years were separately analysed due to the differences in Thai Recommended Dietary Allowances between the two age groups. A whole blood of 300 microL was obtained by "fingerstick" for determination of serum vitamin A. Community or village's vitamin A status was assessed by using Simplified Dietary Assessment (SDA) method and Helen Keller International (HKI) food frequency method. Descriptive statistics were used to analyse the data. All families of the study boys and girls had income lower than the Thailand poverty line (US $ 1,000/year). On average, 63% of children from Mae Hae Tai village, 1.5% of children from Mae Yot village and none of children from Mae Raek village had serum vitamin AKaren children in Mae Chaem district, recommendations were made as follow: (1) increased use of fat and oil, particularly in areas with high risk of VAD; (2) more general work

  14. The Scandinavian Sarcoma Group Central Register: 6,000 patients after 25 years of monitoring of referral and treatment of extremity and trunk wall soft-tissue sarcoma.

    Science.gov (United States)

    Trovik, Clement; Bauer, Henrik C F; Styring, Emelie; Sundby Hall, Kirsten; Vult Von Steyern, Fredrik; Eriksson, Sigvard; Johansson, Ingela; Sampo, Mika; Laitinen, Minna; Kalén, Anders; Jónsson, Halldór; Jebsen, Nina; Eriksson, Mikael; Tukiainen, Erkki; Wall, Najme; Zaikova, Olga; Sigurðsson, Helgi; Lehtinen, Tuula; Bjerkehagen, Bodil; Skorpil, Mikael; Egil Eide, Geir; Johansson, Elisabeth; Alvegard, Thor A

    2017-06-01

    Purpose - We wanted to examine the potential of the Scandinavian Sarcoma Group (SSG) Central Register, and evaluate referral and treatment practice for soft-tissue sarcomas in the extremities and trunk wall (STS) in the Nordic countries. Background - Based on incidence rates from the literature, 8,150 (7,000-9,300) cases of STS of the extremity and trunk wall should have been diagnosed in Norway, Finland, Iceland, and Sweden from 1987 through 2011. The SSG Register has 6,027 cases registered from this period, with 5,837 having complete registration of key variables. 10 centers have been reporting to the Register. The 5 centers that consistently report treat approximately 90% of the cases in their respective regions. The remaining centers have reported all the patients who were treated during certain time periods, but not for the entire 25-year period. Results - 59% of patients were referred to a sarcoma center untouched, i.e. before any attempt at open biopsy. There was an improvement from 52% during the first 5 years to 70% during the last 5 years. 50% had wide or better margins at surgery. Wide margins are now achieved less often than 20 years ago, in parallel with an increase in the use of radiotherapy. For the centers that consistently report, 97% of surviving patients are followed for more than 4 years. Metastasis-free survival (MFS) increased from 67% to 73% during the 25-year period. Interpretation - The Register is considered to be representative of extremity and trunk wall sarcoma disease in the population of Scandinavia, treated at the reporting centers. There were no clinically significant differences in treatment results at these centers.

  15. Girls arrested for murder: an empirical analysis of 32 years of U.S. data by offender age groups.

    Science.gov (United States)

    Heide, Kathleen M; Sellers, Brian G

    2014-01-01

    Most studies on juvenile homicide offenders (JHOs) have used small samples and have concentrated on adolescent male offenders. As a result, little is known about the population of female juveniles arrested for murder. This study utilized the Supplementary Homicide Report (SHR) database to investigate age differences between younger (aged 6-12 years) and older (aged 13-17 years) females arrested for murder in the United States from 1976 to 2007. As predicted, six variables used to test seven hypotheses with respect to younger and older female JHOs in single victim incidents were significant (victim age, victim gender, victim offender relationship, murder weapon, offender count, and homicide circumstance). Regression analysis revealed that younger girls were seven times more likely than older girls to kill children aged 0-12 years. Girls aged 6-12 years were five times more likely than their teen counterparts to be involved in conflict-related homicides as opposed to crime-related homicides. Although approximately the same percentages of younger and older girls killed infants under the age of 1, the victims were significantly different for the two offender age groups. This article concludes with a discussion of our findings and directions for future research. Copyright © 2014 John Wiley & Sons, Ltd.

  16. Nutritional Status among the Children of Age Group 5-14 Years in Selected Arsenic Exposed and Non-Exposed Areas of Bangladesh.

    Directory of Open Access Journals (Sweden)

    Mohammad Rezaul Karim

    2014-12-01

    Full Text Available To assess and compare the nutritional status of children aged 5-14 years in arsenic exposed and non- exposed areas.It was a cross sectional study conducted on 600 children of age 5-14 years from arsenic exposed and non-exposed areas in Bangladesh. Designed questionnaire and check list were used for collection of data. To estimate BMI necessary anthropometric measurements of the studied children were done. Dietary intakes of the study children were assessed using 24-hours recall method.The difference of socio-economic conditions between the children of exposed area and non-exposed area was not significant. On an average the body mass index was found to be significantly (p < 0.01 lower among the children of arsenic exposed area (49% in comparison to that of children in non-exposed area (38%. Stunting (p < 0.01, wasting (p < 0.05 and underweight (p < 0.05 were significantly higher in exposed group in comparison to non-exposed group. No significant difference of nutrition intake was found between exposed and non-exposed children as well as thin and normal children.In this study children exposed to arsenic contaminated water were found to be suffered from lower nutritional status.

  17. Nutritional Status among the Children of Age Group 5-14 Years in Selected Arsenic Exposed and Non-Exposed Areas of Bangladesh.

    Science.gov (United States)

    Rezaul Karim, Mohammad; Ahmad, Sk Akhtar

    2014-12-01

    To assess and compare the nutritional status of children aged 5-14 years in arsenic exposed and non- exposed areas. It was a cross sectional study conducted on 600 children of age 5-14 years from arsenic exposed and non-exposed areas in Bangladesh. Designed questionnaire and check list were used for collection of data. To estimate BMI necessary anthropometric measurements of the studied children were done. Dietary intakes of the study children were assessed using 24-hours recall method. The difference of socio-economic conditions between the children of exposed area and non-exposed area was not significant. On an average the body mass index was found to be significantly (p < 0.01) lower among the children of arsenic exposed area (49%) in comparison to that of children in non-exposed area (38%). Stunting (p < 0.01), wasting (p < 0.05) and underweight (p < 0.05) were significantly higher in exposed group in comparison to non-exposed group. No significant difference of nutrition intake was found between exposed and non-exposed children as well as thin and normal children. In this study children exposed to arsenic contaminated water were found to be suffered from lower nutritional status.

  18. Study of the impact of epidemiological factors on intelligence of rural children of 3 to 6 years age group belonging to low socio-economic status.

    Science.gov (United States)

    Lahiri, S K; Mukhopadhyay, S P; Das, K K; Ray, S K; Biswas, D

    1994-01-01

    There are many factors which affect intelligence as well as physical growth of children, although genetic factor plays a prime role but social, environmental and psychological factors influence significantly the physical growth and intelligence of the child and the same can be improved through intervention. Community based studies are therefore useful to understand effect of these factors for future planning. The present study was therefore undertaken in Burdwan district of West Bengal with the objectives of studying level of intelligence of children of 3 to 6 years age group and impact of the factors related to the level of intelligence of these children. 72 children of 3 to 6 years age group were studied, of which 2/3 were either normal or having Grade-I undernutrition and the rest were either Grade-II or Grade-III. A significant positive association was found between DST IQ score (Bharat Raj) and the nutritional grade. Non-formal education also was found to have significant bearing on the IQ level. No significant relationship was however found between DST IQ score and the religion indicating culture independence of the scoring system.

  19. A non-equivalent group pilot trial of a school-based physical activity and fitness intervention for 10–11 year old english children: born to move

    Directory of Open Access Journals (Sweden)

    Stuart J. Fairclough

    2016-08-01

    Full Text Available Abstract Background PE lessons are the formal opportunity in schools for promotion of physical activity and fitness. This study aimed to evaluate the effectiveness of a pilot PE intervention on physical activity, fitness, and psychosocial outcomes. Methods Participants were 139 children aged 10–11 years from four schools. For six weeks children in two schools received a twice-weekly pilot ‘Born to Move’ (BTM physical activity (PA and fitness intervention alongside one regular PE lesson. Children in the two comparison (COM schools received their regular twice weekly PE lessons. Outcomes were lesson time and whole-day light (LPA, moderate (MPA, vigorous (VPA, and MVPA, and sedentary time, muscular fitness, cardiorespiratory fitness (CRF, and lesson-specific perceived exertion, enjoyment, and perceived competence. Outcomes were assessed at baseline (T0, midway through the intervention (T1, and at the end (T2 using ANOVAs and ANCOVAs. Intervention fidelity was measured using child and teacher surveys at T2 and analysed using Chi-square tests. Results The BTM group engaged in moderate PA for significantly more lesson time (29.4 % than the COM group (25.8 %; p = .009, d = .53. The amount of moderate-to-vigorous PA (MVPA during the T1 BTM lesson contributed 14.0 % to total MVPA, which was significantly more than the COM group’s T1 PE lesson (11.4 %; p < .001, d = .47. The BTM group were significantly more active during the whole-day (p < .05 and the school-day (p < .01. In both groups push-up test performance increased (p < .001 and CRF test performance decreased (p < .01. Perceived exertion, enjoyment, and perceived competence increased in both groups (p < .05, but the BTM group rated their enjoyment of the T1 BTM lesson higher than the COM group rated their PE lesson (p = .02, d = .56. The children’s and teachers’ responses to the intervention indicated that the delivery aims of enjoyment

  20. Oxygen nonstoichiometry and thermo-chemical stability of La0.6Sr0.4CoO3−δ

    International Nuclear Information System (INIS)

    Kuhn, M.; Hashimoto, S.; Sato, K.; Yashiro, K.; Mizusaki, J.

    2013-01-01

    The oxygen nonstoichiometry of La 0.6 Sr 0.4 CoO 3−δ has been the topic of various reports in the literature, but has been exclusively measured at high oxygen partial pressures, pO 2 , and/or elevated temperatures. For applications of La 0.6 Sr 0.4 CoO 3−δ , such as solid oxide fuel cell cathodes or oxygen permeation membranes, knowledge of the oxygen nonstoichiometry and thermo-chemical stability over a wide range of pO 2 is crucial, as localized low pO 2 could trigger failure of the material and device. By employing coulometric titration combined with thermogravimetry, the oxygen nonstoichiometry of La 0.6 Sr 0.4 CoO 3−δ was measured at high and intermediate pO 2 until the material decomposed (at log(pO 2 /bar)≈−4.5 at 1073 K). For a gradually reduced sample, an offset in oxygen content suggests that La 0.6 Sr 0.4 CoO 3−δ forms a “super-reduced” solid solution before decomposing. When the sample underwent alternate reduction–oxidation, a hysteresis-like pO 2 dependence of the oxygen content in the decomposition pO 2 range was attributed to the reversible formation of ABO 3 and A 2 BO 4 phases. Reduction enthalpy and entropy were determined for the single-phase region and confirmed interpolated values from the literature. - Graphical abstract: Oxygen nonstoichiometry (shown as 3−δ) of La 0.6 Sr 0.4 CoO 3−δ as a function of pO 2 at 773–1173 K. The experimental data were obtained by thermogravimetric analysis (TG) and coulometric titration (measured either by a simple reduction (CT1) or a “two-step-forward one-step-back” reduction–oxidation (CT2) procedure). D1 and D2 denote the decomposition pO 2 . The solid lines are the fit to the thermogravimetry and CT1 data. The dashed lines represent the non-equilibrium region where the sample shows a super-reduced state. Highlights: ► Oxygen nonstoichiometry of La 0.6 Sr 0.4 CoO 3−δ at intermediate temperatures and p(O2). ► Experimental confirmation of previously interpolated

  1. Trajectories of disposable income among people of working ages diagnosed with multiple sclerosis: a nationwide register-based cohort study in Sweden 7 years before to 4 years after diagnosis with a population-based reference group.

    Science.gov (United States)

    Murley, Chantelle; Mogard, Olof; Wiberg, Michael; Alexanderson, Kristina; Karampampa, Korinna; Friberg, Emilie; Tinghög, Petter

    2018-05-09

    To describe how disposable income (DI) and three main components changed, and analyse whether DI development differed from working-aged people with multiple sclerosis (MS) to a reference group from 7 years before to 4 years after diagnosis in Sweden. Population-based cohort study, 12-year follow-up (7 years before to 4 years after diagnosis). Swedish working-age population with microdata linked from two nationwide registers. Residents diagnosed with MS in 2009 aged 25-59 years (n=785), and references without MS (n=7847) randomly selected with stratified matching (sex, age, education and country of birth). DI was defined as the annual after tax sum of incomes (earnings and benefits) to measure individual economic welfare. Three main components of DI were analysed as annual sums: earnings, sickness absence benefits and disability pension benefits. We found no differences in mean annual DI between people with and without MS by independent t-tests (p values between 0.15 and 0.96). Differences were found for all studied components of DI from diagnosis year by independent t-tests, for example, in the final study year (2013): earnings (-64 867 Swedish Krona (SEK); 95% CI-79 203 to -50 528); sickness absence benefits (13 330 SEK; 95% CI 10 042 to 16 500); and disability pension benefits (21 360 SEK; 95% CI 17 380 to 25 350). A generalised estimating equation evaluated DI trajectory development between people with and without MS to find both trajectories developed in parallel, both before (-4039 SEK; 95% CI -10 536 to 2458) and after (-781 SEK; 95% CI -6988 to 5360) diagnosis. The key finding of parallel DI trajectory development between working-aged MS and references suggests minimal economic impact within the first 4 years of diagnosis. The Swedish welfare system was responsive to the observed reductions in earnings around MS diagnosis through balancing DI with morbidity-related benefits. Future decreases in economic welfare may be experienced as the

  2. Developing a tool for observing group critical thinking skills in first-year medical students: a pilot study using physiology-based, high-fidelity patient simulations.

    Science.gov (United States)

    Nguyen, Khoa; Ben Khallouq, Bertha; Schuster, Amanda; Beevers, Christopher; Dil, Nyla; Kay, Denise; Kibble, Jonathan D; Harris, David M

    2017-12-01

    Most assessments of physiology in medical school use multiple choice tests that may not provide information about a student's critical thinking (CT) process. There are limited performance assessments, but high-fidelity patient simulations (HFPS) may be a feasible platform. The purpose of this pilot study was to determine whether a group's CT process could be observed over a series of HFPS. An instrument [Critical Thinking Skills Rating Instrument CTSRI)] was designed with the IDEAS framework. Fifteen groups of students participated in three HFPS that consisted of a basic knowledge quiz and introduction, HFPS session, and debriefing. HFPS were video recorded, and two raters reviewed and scored all HFPS encounters with the CTSRI independently. Interrater analysis suggested good reliability. There was a correlation between basic knowledge scores and three of the six observations on the CTSRI providing support for construct validity. The median CT ratings significantly increased for all observations between the groups' first and last simulation. However, there were still large percentages of video ratings that indicated students needed substantial prompting during the HFPS. The data from this pilot study suggest that it is feasible to observe CT skills in HFPS using the CTSRI. Based on the findings from this study, we strongly recommend that first-year medical students be competent in basic knowledge of the relevant physiology of the HFPS before participating, to minimize the risk of a poor learning experience. Copyright © 2017 the American Physiological Society.

  3. Feasibility of Group Schema Therapy for Outpatients with Severe Borderline Personality Disorder in Germany: A Pilot Study with Three Year Follow-Up.

    Science.gov (United States)

    Fassbinder, Eva; Schuetze, Maren; Kranich, Annika; Sipos, Valerija; Hohagen, Fritz; Shaw, Ida; Farrell, Joan; Arntz, Arnoud; Schweiger, Ulrich

    2016-01-01

    Borderline Personality Disorder (BPD) is a severe, challenging to treat mental disorder. Schema therapy (ST) as an individual therapy has been proven to be an effective psychological treatment for BPD. A group format of ST (GST) has been developed and evaluated in a randomized controlled trial in the United States and piloted in The Netherlands. These results suggest that GST speeds up and amplifies treatment effects of ST and might reduce delivery costs. However, feasibility in the German health care system and with BPD patients with high BPD severity and comorbidity, and frequent hospitalization, has not been tested to date. We investigated GST in 10 severely impaired, highly comorbid female patients with BPD, that needed frequent hospital admission. Patients received an outpatient ST-treatment program with weekly group and individual sessions for 1 year. Outcome measures including BPD severity, general psychopathology, psychosocial functioning, quality of life, happiness, schemas, and modes, and days of hospitalization were assessed at the start of treatment and 6, 12, and 36 months later with semi-structured interviews and self-report measures. We observed significant decreases in severity of BPD symptoms, general symptom severity, dysfunctional BPD-specific modes and schemas, and days of hospitalization. Functional modes, quality of live and happiness improved. The results of this feasibility study are promising and encourage further implementation of ST outpatient treatment programs even for patients with severe BPD and high hospitalization risk. However, small sample size and the missing of a control group do not allow the generalizability of these findings.

  4. PREVALENCE OF OVERWEIGHT, OBESITY, PAEDIATRIC METABOLIC SYNDROME AND ASSOCIATED RISK FACTORS AMONG CHILDREN IN THE AGE GROUP OF 10-16 YEARS IN PRIVATE SCHOOLS OF SHIMLA CITY

    Directory of Open Access Journals (Sweden)

    Anmol Gupta

    2017-07-01

    Full Text Available BACKGROUND Paediatric obesity is a complex and growing global problem which is escalating much more rapidly in developing countries like India and considered an important predecessor to NCD multi-morbidity due to changing life style as a result of rapid urbanisation and mechanisation. The aim of this study was to estimate the prevalence of overweight, obesity, paediatric metabolic syndrome and associated risk factors among children in the age group of 10-16 years in private schools of Shimla city. MATERIALS AND METHODS At total of 2100 adolescents attending school (aged 10-16 years participated in this cross-sectional study. All the anthropometric, clinical and biochemical assessment was done after proper consent. Prevalence of overweight and obesity was assessed by using IOTF guidelines and the metabolic syndrome was determined by the Paediatric International Diabetic Federation definition modified for age group. RESULTS The prevalence of overweight, obesity and paediatric metabolic syndrome was 14.5%, 4.1% & 4.3% respectively. In the groups with PMS, hypertension, waist circumference, and TG were significantly higher, and HDL-C was significantly lower. Significant difference was observed in gender, physical activity level, metabolic equivalent, consumption of junk food & time spent on TV in the distribution of overweight, obesity and metabolic syndrome. CONCLUSION Our study highlights the possible role of change in the dietary pattern and physical activity pattern in the development of obesity and metabolic syndrome in early stage of life. Collective efforts of parents and schools are required to institute early preventive measures to reduce progression towards obesity and its future complications.

  5. Report of year 2000 version on basic study for promotion of joint implementation. Feasibility study on energy saving at Anshan Iron and Steel Group Complex

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-03-01

    In order to promote the COP3 joint implementation, a survey was conducted in fiscal 1999 at Anshan Iron and Steel Group Complex in China. The complex is the leading iron and steel maker in China. The unit requirement for energy consumption per ton of crude ore is 7.00 Gcal, which is close to 1.4 times that in Japan. The feasibility study has discussed and planned modification of ignition furnace facilities and waste heat recovery in the sintering process, top-pressure gas recovery at uniform pressure, and top-pressure recovery turbine (TRT) in the blast furnace, based on the locally available data and surveys. The modification of the ignition furnace in the sintering process resulted in reduction of fuel consumption of 578.0 TJ/year in the facility No. 2, and 718.9 TJ/year in the facility No. 3. The amount of electric power generated by the TRT is 121.13 GWh/year assuming the annual blast furnace operation factor of 90%. This can be converted to the heat quantity of 1,370 TJ/year. The top-pressure gas recovery amount is 163 TJ/year when converted to the heat quantity. Annual CO2 reduction amounted to 15,373 tons. The profitability was discussed by using the present worth method. Because of coal price being low and the energy unit price being low in China, it was revealed that the profitability at the private sector level could not be achieved. (NEDO)

  6. Synthesis and thermoelectric performance of a p-type Bi0.4Sb1.6Te3 material developed via mechanical alloying

    International Nuclear Information System (INIS)

    Jimenez, Sandra; Perez, Jose G.; Tritt, Terry M.; Zhu, Song; Sosa-Sanchez, Jose L.; Martinez-Juarez, Javier; López, Osvaldo

    2014-01-01

    Highlights: • This paper shows a Bi 1.6 Sb 0.4 Te 3 alloy prepared by MA-SPS process. • A ZT value of about 1.2–1.3 around 360 K was achieved for this compound. • The lower sintering process was carried out in a short time. • The resulting material has a very fine microstructure and high density. - Abstract: A p-type Bi 0.4 Sb 1.6 Te 3 thermoelectric compound was fabricated via mechanical alloying of bismuth, antimony and tellurium elemental powders as starting materials. The mechanically alloyed compositions were sintered through a spark-plasma sintering (SPS) process. The effect of the milling time was investigated. In order to characterize the powders obtained via mechanical alloying, X-ray diffraction (XRD) and energy dispersive spectroscopy (EDS) analysis were used. The morphological evolution was studied by scanning electron microscopy (SEM). Results showed that the p-type Bi 0.4 Sb 1.6 Te 3 compound was formed after 2 h of milling. Further, the variation of milling time showed that the synthesized phase was stable. All the powders exhibit the same morphology albeit with slight differences. Measurements of the electrical resistivity, Seebeck coefficient and thermal conductivity were performed in the temperature range 300–520 K for the SPS samples. The resulting thermoelectric figure of merit ZT reaches a maximum of 1.2 at 360 K for the p-type bulk material with a 5 h milling time. This study demonstrates the possibility of preparing thermoelectric materials of high performance and short processing time

  7. Structure and substructure analysis of DAFT/FADA galaxy clusters in the [0.4–0.9] redshift range

    Energy Technology Data Exchange (ETDEWEB)

    Guennou, L.; et al.

    2014-01-17

    Context. The DAFT/FADA survey is based on the study of ~90 rich(masses found in the literature >2 x 10^14 M_⊙)and moderately distant clusters (redshifts 0.4 < z < 0.9), all withHST imaging data available. This survey has two main objectives: to constrain dark energy(DE) using weak lensing tomography on galaxy clusters and to build a database (deepmulti-band imaging allowing photometric redshift estimates, spectroscopic data, X-raydata) of rich distant clusters to study their properties.

  8. Study of multimuon events in 0.4x3.0 TeV proton-proton collisions with multimuon spectrometer MMS

    International Nuclear Information System (INIS)

    Abramov, V.V.; Ajinenko, I.V.; Antipov, Yu.M.

    1990-01-01

    The physical motivation and the proposal of an experiment to study multimuon events with a major goal to search and study t-quark production at 0.4x3.0 TeV pp collider with 10 33 cm -2 s -1 luminosity at IHEP are prsented. A muon spectrometer based on magnetized iron combined with hadron and electromagnetic calorimeters not having a track system in the vicinity of beam crossing is described. The spectrometer is capable to cope with the mentioned luminosity. 13 refs.; 9 figs.; 2 tabs

  9. Evidence of a spin resonance mode in the iron-based superconductor Ba(0.6)K(0.4)Fe2As2 from scanning tunneling spectroscopy.

    Science.gov (United States)

    Shan, Lei; Gong, Jing; Wang, Yong-Lei; Shen, Bing; Hou, Xingyuan; Ren, Cong; Li, Chunhong; Yang, Huan; Wen, Hai-Hu; Li, Shiliang; Dai, Pengcheng

    2012-06-01

    We used high-resolution scanning tunneling spectroscopy to study the hole-doped iron pnictide superconductor Ba(0.6)K(0.4)Fe(2)As(2) (T(c)=38 K). Features of a bosonic excitation (mode) are observed in the measured quasiparticle density of states. The bosonic features are intimately associated with the superconducting order parameter and have a mode energy of ~14 meV, similar to the spin resonance measured by inelastic neutron scattering. These results indicate a strong electron-spin excitation coupling in iron pnictide superconductors, similar to that in high-T(c) copper oxide superconductors.

  10. On the prohibition of automatic redundant power supply of 6 and 0.4 kV auxiliary sections at Leningrad NPP

    International Nuclear Information System (INIS)

    Mokeev, S.F.

    1987-01-01

    At Leningrad NPP the automatic switching on of the auxiliary power supply sources of 6 and 0.4 kV is prohibited to provide personnel safety and preserve destruction of electroequipment. With excess of current maximum value in the 6 kV section immediate detachment of all electric motors occurs. At that moment by the switchers detechment emergency signal it occurs immediate swithing on of auxiliary systems or emergency switching on of auxiliary supply of the main circulating pumps, that insreases abruptly operation reliability of plant technological department

  11. Lattice defects in semiconducting Hg/1-x/Cd/x/Te alloys. III - Defect structure of undoped Hg0.6Cd0.4Te

    Science.gov (United States)

    Vydyanath, H. R.; Donovan, J. D.; Nelson, D. A.

    1981-01-01

    Hall effect measurements were carried out on undoped Hg0.6Cd0.4Te crystals quenched to room temperature subsequent to equilibration at temperatures varying from 450 to 720 C under various partial pressures of Hg. The variation of the hole concentration as a function of the partial pressure of Hg indicates that the native acceptor defects are doubly ionized. Native donor defects are found to be negligible in concentration and the p-type to n-type conversion is shown to be due to residual donors and not due to native donor defects. Thermodynamic constant for the incorporation of the doubly ionized native acceptor defect has been established.

  12. Substrate influence on the magnetoresistance and magnetic order in La{sub 0.6}Sr{sub 0.4}MnO{sub 3} films

    Energy Technology Data Exchange (ETDEWEB)

    Steren, L.B. E-mail: steren@cab.cnea.gov.ar; Sirena, M.; Guimpel, J

    2000-03-01

    We report structural, magnetic and transport measurements on La{sub 0.6}Sr{sub 0.4}MnO{sub 3} thin films grown on MgO and TiSrO{sub 3} substrates with thickness varying from 5 to 500 nm. We find that the lattice mismatch between substrates and films affects the morphology and induced-strains of the films. We show that these two different effects strongly influence the ferromagnetic order, the metal-insulator transition, the localization of the current carriers and the magnetoresistance of these materials.

  13. Substrate influence on the magnetoresistance and magnetic order in La0.6Sr0.4MnO3 films

    International Nuclear Information System (INIS)

    Steren, L.B.; Sirena, M.; Guimpel, J.

    2000-01-01

    We report structural, magnetic and transport measurements on La 0.6 Sr 0.4 MnO 3 thin films grown on MgO and TiSrO 3 substrates with thickness varying from 5 to 500 nm. We find that the lattice mismatch between substrates and films affects the morphology and induced-strains of the films. We show that these two different effects strongly influence the ferromagnetic order, the metal-insulator transition, the localization of the current carriers and the magnetoresistance of these materials

  14. Hall effect in La{sub 0.6}Sr{sub 0.4}MnO{sub 3} thin films

    Energy Technology Data Exchange (ETDEWEB)

    Granada, M. E-mail: granadam@cab.cnea.gov.ar; Maiorov, B.; Sirena, M.; Steren, L.B.; Guimpel, J

    2004-05-01

    We studied the temperature and thickness dependence of the transport properties of La{sub 0.6}Sr{sub 0.4}MnO{sub 3} films. Hall voltage and magnetoresistance measurements on 10 and 150 nm thick films were performed with this purpose. From the ordinary Hall component, we calculated the density of carriers, which has hole-character and is systematically lower than that expected from the chemical composition of the manganite in both samples. Localization effects observed at low temperature in the resistivity of the thinner film, associated with the substrate-induced disorder, are correlated with a decrease of the density of carriers.

  15. Study of deuteron photodisintegration with linearly polarized photons over the energy range E/sub el/ = 0. 4 to 0. 8 GeV

    Energy Technology Data Exchange (ETDEWEB)

    Agababyan, K.S.; Adamyan, F.V.; Akopyan, G.G.; Vartapetyan, G.A.; Galumyan, P.I.; Grabskii, V.O.; Karapetyan, V.V.; Karapetyan, G.V.; Kordonskii, M.S.

    1985-06-01

    We describe the experimental methods and the results of measurements of the asymmetry of the cross section of the eld pn reaction induced by linearly polarized photons over the energy range E/sub el/ = 0.4 to 0.8 GeV and proton angles in the c.m. system theta* = 45 to 95. Experiments were conducted on a two-arm spectrometer installation. The results obtained do not agree either with calculations within the framework of phenomenological models, or with predictions of a partial-wave analysis that includes the contribution of dibaryon resonances.

  16. Magnetic and transport properties of Zn0.4Fe2.6O4 thin films with highly preferential orientation

    International Nuclear Information System (INIS)

    Lu, Z.L.; Zou, W.Q.; Liu, X.C.; Lin, Y.B.; Lu, Z.H.; Wang, J.F.; Xu, J.P.; Lv, L.Y.; Zhang, F.M.; Du, Y.W.

    2007-01-01

    Highly preferentially oriented Zn 0.4 Fe 2.6 O 4 thin films have been fabricated on Si, SrTiO 3 and ZrO 2 substrates, respectively, using RF magnetron sputtering. All the films show a large saturation magnetization of about 4.2μ B and low coercive field at 300 K and a spin (cluster) glass transition at about 60 K due to the non-magnetic Zn 2+ ions substitution. Moreover, the fairly high spin polarization of the carrier at 300 K has been confirmed by both the giant magnetoresistance and anomalous Hall coefficient measurements

  17. Experimental investigation of neutron generation in thick target blocks of Pb, Hg and W with 0.4 to 2.5 GeV proton beams

    International Nuclear Information System (INIS)

    Jahnke, U.; Enke, M.; Filges, D.

    2002-01-01

    Detailed experimental neutron data relevant to the design of the target station of neutron spallation sources have been gathered by the NESSI-collaboration at the COSY accelerator in FZ Juelich. Numerous neutron multiplicity distributions and reaction probabilities have been measured for 0.4 to 2.5 GeV protons bombarding highly segmented target blocks from Pb, Hg and W of up to 35 cm in length and 15 cm in diameter with the intention to provide a comprehensive data base for the improvement and validation of existing reaction simulation codes. (author)

  18. Kinetics and Mechanisms of Oxygen Surface Exchange on La0.6Sr0.4FeO3-delta Thin Films

    OpenAIRE

    Mosleh, Majid; Søgaard, Martin; Hendriksen, Peter Vang

    2009-01-01

    The thermodynamic properties as well as oxygen exchange kinetics were examined on mixed ionic and electronic conducting (La0.6Sr0.4)0.99FeO3− (LSF64) thin films deposited on MgO single crystals. It is found that thin films and bulk material have the same oxygen stoichiometry for a given temperature and oxygen partial pressure [i.e., the incorporation reaction has the same reaction enthalpy (H0=−105 KJ/mol) and entropy (S0=−75.5 J/mol/K) as found for bulk material]. The thin film shows smaller...

  19. Mass absorption and mass energy transfer coefficients for 0.4-10 MeV gamma rays in elemental solids and gases

    Energy Technology Data Exchange (ETDEWEB)

    Gurler, O. [Physics Department, Faculty of Arts and Sciences, Uludag University, Gorukle Campus, 16059 Bursa (Turkey)], E-mail: ogurler@uludag.edu.tr; Oz, H. [Physics Department, Faculty of Arts and Sciences, Uludag University, Gorukle Campus, 16059 Bursa (Turkey); Yalcin, S. [Education Faculty, Kastamonu University, 37200 Kastamonu (Turkey); Gundogdu, O. [Department of Physics, University of Surrey, Guildford GU2 7XH (United Kingdom); NCCPM, Medical Physics, Royal Surrey County Hospital, GU2 7XX (United Kingdom)

    2009-01-15

    The mass energy absorption, the mass energy transfer and mass absorption coefficients have been widely used for problems and applications involving dose calculations. Direct measurements of the coefficients are difficult, and theoretical computations are usually employed. In this paper, analytical equations are presented for determining the mass energy transfer and mass absorption coefficients for gamma rays with an incident energy range between 0.4 and 10 MeV in nitrogen, silicon, carbon, copper and sodium iodide. The mass absorption and mass energy transfer coefficients for gamma rays were calculated, and the results obtained were compared with the values reported in the literature.

  20. Photon mass energy absorption coefficients from 0.4 MeV to 10 MeV for silicon, carbon, copper and sodium iodide

    International Nuclear Information System (INIS)

    Oz, H.; Gurler, O.; Gultekin, A.; Yalcin, S.; Gundogdu, O.

    2006-01-01

    The absorption coefficients have been widely used for problems and applications involving dose calculations. Direct measurements of the coefficients are difficult, and theoretical computations are usually employed. In this paper, analytical equations are presented for determining the mass energy absorption coefficients for gamma rays with an incident energy range between 0.4 MeV and 10 MeV in silicon, carbon, copper and sodium iodide. The mass energy absorption coefficients for gamma rays were calculated, and the results obtained were compared with the values reported in the literature.

  1. Mass absorption and mass energy transfer coefficients for 0.4-10 MeV gamma rays in elemental solids and gases

    International Nuclear Information System (INIS)

    Gurler, O.; Oz, H.; Yalcin, S.; Gundogdu, O.

    2009-01-01

    The mass energy absorption, the mass energy transfer and mass absorption coefficients have been widely used for problems and applications involving dose calculations. Direct measurements of the coefficients are difficult, and theoretical computations are usually employed. In this paper, analytical equations are presented for determining the mass energy transfer and mass absorption coefficients for gamma rays with an incident energy range between 0.4 and 10 MeV in nitrogen, silicon, carbon, copper and sodium iodide. The mass absorption and mass energy transfer coefficients for gamma rays were calculated, and the results obtained were compared with the values reported in the literature

  2. Photon mass energy absorption coefficients from 0.4 MeV to 10 MeV for silicon, carbon, copper and sodium iodide

    Energy Technology Data Exchange (ETDEWEB)

    Oz, H.; Gurler, O.; Gultekin, A. [Uludag University, Bursa (Turkmenistan); Yalcin, S. [Kastamonu University, Kastamonu (Turkmenistan); Gundogdu, O. [University of Surrey, Guildford (United Kingdom)

    2006-07-15

    The absorption coefficients have been widely used for problems and applications involving dose calculations. Direct measurements of the coefficients are difficult, and theoretical computations are usually employed. In this paper, analytical equations are presented for determining the mass energy absorption coefficients for gamma rays with an incident energy range between 0.4 MeV and 10 MeV in silicon, carbon, copper and sodium iodide. The mass energy absorption coefficients for gamma rays were calculated, and the results obtained were compared with the values reported in the literature.

  3. Nature of the magnetic order in the charge-ordered cuprate La1.48Nd0.4Sr0.12CuO4

    DEFF Research Database (Denmark)

    Christensen, Niels Bech; Rønnow, H.M.; Mesot, J.

    2007-01-01

    Using polarized neutron scattering we establish that the magnetic order in La1.48Nd0.4Sr0.12CuO4 is either (i) one dimensionally modulated and collinear, consistent with the stripe model or (ii) two dimensionally modulated with a novel noncollinear structure. The measurements rule out a number...... of alternative models characterized by 2D electronic order or 1D helical spin order. The low-energy spin excitations are found to be primarily transversely polarized relative to the stripe ordered state, consistent with conventional spin waves....

  4. Repeatability of Brain Volume Measurements Made with the Atlas-based Method from T1-weighted Images Acquired Using a 0.4 Tesla Low Field MR Scanner.

    Science.gov (United States)

    Goto, Masami; Suzuki, Makoto; Mizukami, Shinya; Abe, Osamu; Aoki, Shigeki; Miyati, Tosiaki; Fukuda, Michinari; Gomi, Tsutomu; Takeda, Tohoru

    2016-10-11

    An understanding of the repeatability of measured results is important for both the atlas-based and voxel-based morphometry (VBM) methods of magnetic resonance (MR) brain volumetry. However, many recent studies that have investigated the repeatability of brain volume measurements have been performed using static magnetic fields of 1-4 tesla, and no study has used a low-strength static magnetic field. The aim of this study was to investigate the repeatability of measured volumes using the atlas-based method and a low-strength static magnetic field (0.4 tesla). Ten healthy volunteers participated in this study. Using a 0.4 tesla magnetic resonance imaging (MRI) scanner and a quadrature head coil, three-dimensional T 1 -weighted images (3D-T 1 WIs) were obtained from each subject, twice on the same day. VBM8 software was used to construct segmented normalized images [gray matter (GM), white matter (WM), and cerebrospinal fluid (CSF) images]. The regions-of-interest (ROIs) of GM, WM, CSF, hippocampus (HC), orbital gyrus (OG), and cerebellum posterior lobe (CPL) were generated using WFU PickAtlas. The percentage change was defined as[100 × (measured volume with first segmented image - mean volume in each subject)/(mean volume in each subject)]The average percentage change was calculated as the percentage change in the 6 ROIs of the 10 subjects. The mean of the average percentage changes for each ROI was as follows: GM, 0.556%; WM, 0.324%; CSF, 0.573%; HC, 0.645%; OG, 1.74%; and CPL, 0.471%. The average percentage change was higher for the orbital gyrus than for the other ROIs. We consider that repeatability of the atlas-based method is similar between 0.4 and 1.5 tesla MR scanners. To our knowledge, this is the first report to show that the level of repeatability with a 0.4 tesla MR scanner is adequate for the estimation of brain volume change by the atlas-based method.

  5. A new rechargeable lithium-ion battery with a xLi2MnO3.(1 - x) LiMn0.4Ni0.4Co0.2O2 cathode and a hard carbon anode

    International Nuclear Information System (INIS)

    Liu Jinlong; Wang Jie; Xia Yongyao

    2011-01-01

    Highlights: → A new type of battery with 0.4Li 2 MnO 3 0.6LiMn 0.4 Ni 0.4 Co 0.2 O 2 and hard carbon was proposed. → The irreversible capacity encountered at both electrodes, can be counterbalanced each other. → The battery delivers capacities of 105 mAh g -1 and specific energies of 315 Wh kg -1 . - Abstract: We reported a new type of rechargeable lithium-ion battery consisting of a structurally integrated 0.4Li 2 MnO 3 .0.6LiMnNi 0.4 Co 0.2 O 2 cathode and a hard carbon anode. The drawback of the high irreversible capacity loss of both electrodes, occurring at the first charge/discharge process, can be counterbalanced each other. The battery shows good reversibility with a sloping voltage from 1.5 V to 4.5 V and delivers a capacity of 105 mA h g -1 and a specific energy of 315 W h kg -1 based on the total weight of the both active electrode materials.

  6. A non-equivalent group pilot trial of a school-based physical activity and fitness intervention for 10-11 year old english children: born to move.

    Science.gov (United States)

    Fairclough, Stuart J; McGrane, Bronagh; Sanders, George; Taylor, Sarah; Owen, Michael; Curry, Whitney

    2016-08-24

    PE lessons are the formal opportunity in schools for promotion of physical activity and fitness. This study aimed to evaluate the effectiveness of a pilot PE intervention on physical activity, fitness, and psychosocial outcomes. Participants were 139 children aged 10-11 years from four schools. For six weeks children in two schools received a twice-weekly pilot 'Born to Move' (BTM) physical activity (PA) and fitness intervention alongside one regular PE lesson. Children in the two comparison (COM) schools received their regular twice weekly PE lessons. Outcomes were lesson time and whole-day light (LPA), moderate (MPA), vigorous (VPA), and MVPA, and sedentary time, muscular fitness, cardiorespiratory fitness (CRF), and lesson-specific perceived exertion, enjoyment, and perceived competence. Outcomes were assessed at baseline (T0), midway through the intervention (T1), and at the end (T2) using ANOVAs and ANCOVAs. Intervention fidelity was measured using child and teacher surveys at T2 and analysed using Chi-square tests. The BTM group engaged in moderate PA for significantly more lesson time (29.4 %) than the COM group (25.8 %; p = .009, d = .53). The amount of moderate-to-vigorous PA (MVPA) during the T1 BTM lesson contributed 14.0 % to total MVPA, which was significantly more than the COM group's T1 PE lesson (11.4 %; p competence increased in both groups (p fitness, and psychosocial outcomes. Further, BTM was enjoyed by the children, and valued by the teachers. This study can inform the design of a modified larger-scale cluster RCT evaluation.

  7. Atrial fibrillation in immigrant groups: a cohort study of all adults 45 years of age and older in Sweden.

    Science.gov (United States)

    Wändell, Per; Carlsson, Axel C; Li, Xinjun; Gasevic, Danijela; Ärnlöv, Johan; Holzmann, Martin J; Sundquist, Jan; Sundquist, Kristina

    2017-09-01

    To study the association between country of birth and incident atrial fibrillation (AF) in several immigrant groups in Sweden. The study population included all adults (n = 3,226,752) aged 45 years and older in Sweden. AF was defined as having at least one registered diagnosis of AF in the National Patient Register. The incidence of AF in different immigrant groups, using Swedish-born as referents, was assessed by Cox regression, expressed in hazard ratios (HRs) and 95% confidence intervals (CI). All models were stratified by sex and adjusted for age, geographical residence in Sweden, educational level, marital status, and neighbourhood socioeconomic status. Compared to their Swedish-born counterparts, higher incidence of AF [HR (95% CI)] was observed among men from Bosnia 1.74 (1.56-1.94) and Latvia 1.29 (1.09-1.54), and among women from Iraq 1.96 (1.67-2.31), Bosnia 1.88 (1.61-1.94), Finland 1.14 (1.11-1.17), Estonia 1.14 (1.05-1.24) and Germany 1.08 (1.03-1.14). Lower incidence of AF was noted among men (HRs ≤ 0.60) from Iceland, Southern Europe (especially Greece, Italy and Spain), Latin America (especially Chile), Africa, Asia (including Iraq, Turkey, Lebanon and Iran), and among women from Nordic countries (except Finland), Southern Europe, Western Europe (except Germany), Africa, North America, Latin America, Iran, Lebanon and other Asian countries (except Turkey and Iraq). In conclusion, we observed substantial differences in incidence of AF between immigrant groups and the Swedish-born population. A greater awareness of the increased risk of AF development in some immigrant groups may enable for a timely diagnosis, treatment and prevention of its debilitating complications, such as stroke.

  8. Determination of hydrogen peroxide and glucose using a novel sensor platform based on Co0.4Fe0.6LaO3 nanoparticles

    International Nuclear Information System (INIS)

    Zhang, Zhen; Gu, Shuqing; Ding, Yaping; Zhang, Fenfen; Jin, Jindi

    2013-01-01

    We report on a novel nonenzymatic sensor platform for the determination of hydrogen peroxide and glucose. It is based on a carbon paste electrode that was modified with Co 0.4 Fe 0.6 LaO 3 nanoparticles synthesized by the sol–gel method. The structure and morphology of Co 0.4 Fe 0.6 LaO 3 nanoparticles were characterized by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The electrochemical performance of this sensor was evaluated by cyclic voltammetry and amperometry, and the results demonstrated that it exhibits strong electrocatalytical activity towards the oxidation of H 2 O 2 and glucose in an alkaline medium. The sensor has a limit of detection as low as 2.0 nM of H 2 O 2 and a linear range that extends from 0.01 to 800 μM. The response to glucose is characterized by two analytical ranges of different slope, viz. from 0.05 to 5 μM and from 5 to 500 μM, with a 10 nM limit of detection. The glucose sensor has a fast response and good long term stability. (author)

  9. Nanosecond and femtosecond ablation of La0.6Ca0.4CoO3: a comparison between plume dynamics and composition of the films

    DEFF Research Database (Denmark)

    Canulescu, Stela; Papadopoulou, E.; Anglos, D.

    2011-01-01

    Thin films of La0.6Ca0.4CoO3 were grown by pulsed laser ablation with nanosecond and femtosecond pulses. The films deposited with femtosecond pulses (248 nm, 500 fs pulse duration) exhibit a higher surface roughness and deficiency in the cobalt content compared to the films deposited with nanosec......Thin films of La0.6Ca0.4CoO3 were grown by pulsed laser ablation with nanosecond and femtosecond pulses. The films deposited with femtosecond pulses (248 nm, 500 fs pulse duration) exhibit a higher surface roughness and deficiency in the cobalt content compared to the films deposited...... and in a background pressure of 60 Pa of oxygen. The ns-induced plume in vacuum exhibits a spherical shape, while for femtosecond ablation the plume is more elongated along the expansion direction, but with similar velocities for ns and fs laser ablation. In the case of ablation in the background gas similar...

  10. Crystal structure and electronic states of Co and Gd ions in a Gd0.4Sr0.6CoO2.85 single crystal

    Science.gov (United States)

    Platunov, M. S.; Dudnikov, V. A.; Orlov, Yu. S.; Kazak, N. V.; Solovyov, L. A.; Zubavichus, Ya. V.; Veligzhanin, A. A.; Dorovatovskii, P. V.; Vereshchagin, S. N.; Shaykhutdinov, K. A.; Ovchinnikov, S. G.

    2016-02-01

    X-ray diffraction and X-ray absorption near edge structure (XANES) spectra have been measured at the Co K-edge and Gd L 3-edge in GdCoO3 and Gd0.4Sr0.6CoO2.85 cobaltites. The effect of Sr substitution on the crystal structure and electronic and magnetic states of Co3+ ions in a Gd0.4Sr0.6CoO2.85 single crystal has been analyzed. The XANES measurements at the Co K-edge have not showed a noticeable shift of the absorption edge with an increase in the concentration of Sr. This indicates that the effective valence of cobalt does not change. An increase in the intensity of absorption at the Gd L 3-edge is due to an increase in the degree of hybridization of the Gd(5 d) and O(2 p) states. The effect of hole doping on the magnetic properties results in the appearance of the ferromagnetic component and in a significant increase in the magnetic moment.

  11. In-plane optical spectral weight redistribution in the optimally doped Ba0.6 K0.4Fe2As2 superconductor

    International Nuclear Information System (INIS)

    Xu Bing; Dai Yao-Min; Xiao Hong; Qiu Xiang-Gang; Lobo, R. P. S. M.

    2014-01-01

    We performed detailed temperature-dependent optical measurements on optimally doped Ba 0.6 K 0.4 Fe 2 As 2 single crystal. We examine the changes of the in-plane optical conductivity spectral weight in the normal state and the evolution of the superconducting condensate in the superconducting state. In the normal state, the low-frequency spectral weight shows a metallic response with an arctan (T) dependence, indicating a T-linear scattering rate behavior for the carriers. A high energy spectral weight transfer associated with the Hund's coupling occurs from the low frequencies below 4000 cm −1 ∼ 5000 cm −1 to higher frequencies up to at least 10 cm −1 . Its temperature dependence analysis suggests that the Hund's coupling strength is continuously enhanced as the temperature is reduced. In the superconducting state, the FGT sum rule is conserved according to the spectral weight estimation within the conduction bands, only about 40% of the conduction bands participates in the superconducting condensate indicating that Ba 0.6 K 0.4 Fe 2 As 2 is in dirty limit. (condensed matter: electronic structure, electrical, magnetic, and optical properties)

  12. AC Electroluminescent Processes in Pr3+-Activated (Ba0.4Ca0.6TiO3 Diphase Polycrystals

    Directory of Open Access Journals (Sweden)

    Nan Gao

    2017-05-01

    Full Text Available We investigated the properties of alternating current (AC-driven electroluminescence from (Ba0.4Ca0.6TiO3:Pr3+ diphase polycrystal-based device. The results of crystal phases and micrographs, and the symmetrical dual emissions in one AC cycle, indicate the spontaneous formation of a dielectric/phosphor/dielectric sandwich microstructure in (Ba0.4Ca0.6TiO3:Pr3+. The electroluminescent device emits a red light of 617 nm, which is attributed to the 1D2-3H4 transition of Pr3+ in the phosphor phase. At a fixed AC frequency, the intensity of electroluminescence exhibits a steep enhancement when applying an increased driving electric field that is beyond a threshold. In a fixed driving electric field, the intensity of electroluminescence shows a rapid rise at low frequencies, but reaches saturation at high frequencies. Based on a double-injection model, we discussed systematically the electroluminescent processes in a whole cycle of AC electric field, which matched well with the experimental data. Our investigation is expected to expand our understanding of such a diphase electroluminescent device, thereby promoting their applications in lighting and displays.

  13. Cr-poisoning of a LaNi{sub 0.6}Fe{sub 0.4}O{sub 3} cathode under current load

    Energy Technology Data Exchange (ETDEWEB)

    Stodolny, M.K.; Van Berkel, F.P.F. [Energy Research Centre of the Netherlands ECN, Unit Hydrogen and Clean Fossil Fuels, P.O. Box 1, 1755 ZG, Petten (Netherlands); Boukamp, B.A.; Blank, D.H.A. [Department of Science and Technology and MESA Institute for Nanotechnology, University of Twente, 7500 AE, Enschede (Netherlands)

    2012-07-15

    This study demonstrates the significant impact of Cr-poisoning on the performance of the LaNi{sub 0.6}Fe{sub 0.4}O{sub 3} (LNF) SOFC cathode under current load. Volatile Cr-species, originating from a porous metallic foam, enter the working electrode and modify both the LNF cathode layer and the Gd{sub 0.4}Ce{sub 0.6}O{sub 1.8} (GDC) barrier layer, causing increasing overpotential and cell impedance. The increase of the ohmic resistance is caused by a decrease of the in-plane electronic conductivity of the LNF layer (due to Cr incorporation and Ni removal from the LNF perovskite lattice) combined with a deterioration of the ionic conductivity of the GDC barrier layer due to reactivity with Cr resulting in formation of a GdCrO{sub 3}-phase. The increase of the polarisation resistance is caused by a decrease of the electrochemical activity of the LNF surface towards oxygen reduction reaction at the triple phase boundary (TPB) due to Cr-incorporation in the outer shell of the LNF grains. Chemical reaction and electrochemically driven reaction of volatile Cr-species with LNF and GDC contributes to the extrinsic degradation of the LNF cathodes under current load.

  14. Surfactant-controlled synthesis of Pd/Ce0.6Zr0.4O2 catalyst for NO reduction by CO with excess oxygen

    International Nuclear Information System (INIS)

    Chen, L.F.; Gonzalez, G.; Wang, J.A.; Norena, L.E.; Toledo, A.; Castillo, S.; Moran-Pineda, M.

    2005-01-01

    For the first time, this work reports a surfactant-controlled synthetic method to obtain a nanophase of mesoporous ceria-zirconia solid solution containing cationic defects in the crystalline structure. The incorporation of a cationic surfactant (myristyltrimethylammonium bromide) into the ceria-zirconia solid network not only controlled the pore diameter distribution but also induced creation of the lattice defect. Ceria-zirconia solid solution showed crystal microstrain and structural distortion that varied with the calcination temperature. Compared to pure ceria, the addition of zirconium to the ceria promoted the bulk oxygen reducibility and enhanced the thermal stability of the solid. Hydrogen could be stored into or released from the PdO/Ce 0.6 Zr 0.4 O 2 catalyst during the TPR procedure, which is associated to the formation/decomposition of a PdH x phase, due to the hydrogen dissociation catalyzed by metallic Pd. At cool start of reaction, NO reduction by CO with excess oxygen over the Pd/Ce 0.6 Zr 0.4 O 2 catalyst showed selectivity around 100% to N 2 . A competition between NO reduction by CO and CO oxidation by O 2 was observed: at reaction temperatures below 200 deg. C, NO inhibited CO oxidation activity; however, at reaction temperatures above 200 deg. C, high activity of CO oxidation resulted in an inhibition effect on NO reduction

  15. Electronic structure of bismuth in high-temperature superconductor Bi1.6Pb0.4Sr2Ca2.5Cu3.5Oσ

    International Nuclear Information System (INIS)

    Band, I.M.; Egorovm, A.I.; Karazhanova, G.I.

    1990-01-01

    The shifts of K α1 X-ray of bismuth in the HTS-ceramic Bi 1.6 Pb 0.4 Sr 2 Ca 2.5 Cu 5 O σ and Bi 2 O 3 are measured experimentally. It is shown that bismuth is threevalent in the HTS-ceramic. From comparison of the experimental values of shifts with theoretical values calculated within the framework of different modifications of Hartree-Fock method the effective charge at the bismuth atoms in these compounds is determined: q(Bi 2 O 3 )=1.5+2.0, q(Bi 1.6 Pb 0.4 Sr 2 Ca 2.5 Cu 3.5 O σ )= 1.6+2.1. It was suggested, That the Bi significant covalence degree in HTS-ceramic may be a cause of noticeable contribution of the Bi 6p-states in the density of states at Fermi-level. 13 refs.; 1 fig.; 2 tabs

  16. Low Power Resistive Oxygen Sensor Based on Sonochemical SrTi0.6Fe0.4O2.8 (STFO40

    Directory of Open Access Journals (Sweden)

    Alisa Stratulat

    2015-07-01

    Full Text Available The current paper reports on a sonochemical synthesis method for manufacturing nanostructured (typical grain size of 50 nm SrTi0.6Fe0.4O2.8 (Sono-STFO40 powder. This powder is characterized using X ray-diffraction (XRD, Mössbauer spectroscopy and Scanning Electron Microscopy (SEM, and results are compared with commercially available SrTi0.4Fe0.6O2.8 (STFO60 powder. In order to manufacture resistive oxygen sensors, both Sono-STFO40 and STFO60 are deposited, by dip-pen nanolithography (DPN method, on an SOI (Silicon-on-Insulator micro-hotplate, employing a tungsten heater embedded within a dielectric membrane. Oxygen detection tests are performed in both dry (RH = 0% and humid (RH = 60% nitrogen atmosphere, varying oxygen concentrations between 1% and 16% (v/v, at a constant heater temperature of 650 °C. The oxygen sensor, based on the Sono-STFO40 sensing layer, shows good sensitivity, low power consumption (80 mW, and short response time (25 s. These performance are comparable to those exhibited by state-of-the-art O2 sensors based on STFO60, thus proving Sono-STFO40 to be a material suitable for oxygen detection in harsh environments.

  17. Electron magnetic resonance study of monovalent Na doping in Pr0.6Sr0.4−xNaxMnO3 manganites

    International Nuclear Information System (INIS)

    Thaljaoui, Rachid; Boujelben, Wahiba; Pękała, Marek; Szydłowska, Jadwiga; Cheikhrouhou, Abdelwaheb

    2012-01-01

    Highlights: ► New monovalent doped manganites Pr 0.6 Sr 0.4−x Na x MnO 3 (x = 0, 0.05). ► Comparison of electron magnetic resonance spectra in ferro- and paramagnetic phases. ► Double exchange interactions weakened by Na doping as indicated by activation energy. ► Magnetic susceptibility derived from resonance intensity obeys Curie–Weiss law. - Abstract: Effect of monovalent Na doping on the magnetic properties is studied in Pr 0.6 Sr 0.4−x Na x MnO 3 system (x = 0, 0.05) using X-band electron magnetic resonance and magnetization measurements. Temperature variation of magnetic resonance spectra of doped and undoped manganites is analyzed for paramagnetic and ferromagnetic states and compared to similar systems. In paramagnetic phase the magnetic susceptibility proportional to resonance signal intensity is found to obey the Curie–Weiss law. The effective magnetic moment becomes smaller in doped manganite. The paramagnetic Curie temperature derived from signal intensity equals to 312 and 306 K for the undoped and doped manganites, respectively, and is close to values obtained from magnetization variation in paramagnetic phase. The activation energy determined using the adiabatic small polaron hopping model is higher for the undoped than the doped manganite, which proves that the Na doping slightly reduces the Mn 3+ /Mn 4+ double exchange interactions.

  18. Collective Dynamics and Strong Pinning near the Onset of Charge Order in La1.48Nd0.4Sr0.12CuO4

    Science.gov (United States)

    Baity, P. G.; Sasagawa, T.; Popović, Dragana

    2018-04-01

    The dynamics of charge-ordered states is one of the key issues in underdoped cuprate high-temperature superconductors, but static short-range charge-order (CO) domains have been detected in almost all cuprates. We probe the dynamics across the CO (and structural) transition in La1.48Nd0.4Sr0.12CuO4 by measuring nonequilibrium charge transport, or resistance R as the system responds to a change in temperature and to an applied magnetic field. We find evidence for metastable states, collective behavior, and criticality. The collective dynamics in the critical regime indicates strong pinning by disorder. Surprisingly, nonequilibrium effects, such as avalanches in R , are revealed only when the critical region is approached from the charge-ordered phase. Our results on La1.48Nd0.4Sr0.12CuO4 provide the long-sought evidence for the fluctuating order across the CO transition, and also set important constraints on theories of dynamic stripes.

  19. Preparation of cauliflower-like shaped Ba0.6Sr0.4TiO3 powders by modified oxalate co-precipitation method

    International Nuclear Information System (INIS)

    Li Mingli; Xu Mingxia

    2009-01-01

    The quantitative barium-strontium titanyl oxalate (Ba 0.6 Sr 0.4 TiO(C 2 O 4 ) 2 .4H 2 O, BSTO) precursor powders were prepared by the modified oxalate co-preparation method. It was based on the cation-exchange reaction between the stoichiometric solutions of oxalotitanic acid (H 2 TiO(C 2 O 4 ) 2 , HTO) and barium + strontium nitrate solution containing stoichiometric quantities of Ba and Sr ions. The pyrolysis of BSTO at 800 deg. C/4 h in air produced the homogeneous cauliflower-like shaped barium-strontium titanate (Ba 0.6 Sr 0.4 TiO 3 , BST) powders. The effect of polyethylene glycol (PEG) on morphology of BSTO and BST powders was also investigated. The characterization studies were carried on the as-dried BSTO and calcined BST powders by various physicochemical techniques, IR, X-ray diffraction (XRD), scanning electron microscopy (SEM), etc. The BSTO and BST powders obtained by aforementioned technique without PEG were homogeneous with spherical shape. The particles grew into spindle shape with the effect of PEG

  20. Comparison between La0.6Sr0.4CoO3-d and LaNi0.6Co0.4O3-d infiltrated oxygen electrodes for long-term durable solid oxide fuel cells

    DEFF Research Database (Denmark)

    Ovtar, Simona; Hauch, Anne; Veltzé, Sune

    2018-01-01

    The degradation of infiltrated oxygen electrodes during long-term operation of solid oxide fuel cells (SOFCs) was studied. The infiltrated oxygen electrodes were prepared by infiltration of the electro-catalysts La0.6Sr0.4CoO3-d (LSC) and LaNi0.6Co0.4O3-d (LCN) into a porous yttria stabilized...... conducted and the change of resistance was followed by electrochemical impedance spectroscopy under current load. The cell performance degradation profiles of the LSC and LCN infiltrated cells showed significant differences. The performance of the LSC infiltrated cell stabilized after 700 h of operation...

  1. Reliability and Validity of Food Frequency Questions to Assess Beverage and Food Group Intakes among Low-Income 2- to 4-Year-Old Children.

    Science.gov (United States)

    Koleilat, Maria; Whaley, Shannon E

    2016-06-01

    Fruits, vegetables, sweetened foods, and beverages have been found to have positive and negative associations with obesity in early childhood, yet no rapid assessment tools are available to measure intake of these foods among preschoolers. This study examines the test-retest reliability and validity of a 10-item Child Food and Beverage Intake Questionnaire designed to assess fruits, vegetables, and sweetened foods and beverages intake among 2- to 4-year-old children. The Child Food and Beverage Intake Questionnaire was developed for use in periodic phone surveys conducted with low-income families with preschool-aged children. Seventy primary caregivers of 2- to 4-year-old children completed two Child Food and Beverage Intake Questionnaires within a 2-week period for test-retest reliability. Participants also completed three 24-hour recalls to allow assessment of validity. Intraclass correlations were used to examine test-retest reliability. Spearman rank correlation coefficients, Bland-Altman plots, and linear regression analyses were used to examine validity of the Child Food and Beverage Intake Questionnaire compared with three 24-hour recalls. Intraclass correlations between Child Food and Beverage Intake Questionnaire administrations ranged from 0.48 for sweetened drinks to 0.87 for regular sodas. Intraclass correlations for fruits, vegetables, and sweetened food were 0.56, 0.49, and 0.56, respectively. Spearman rank correlation coefficients ranged from 0.15 to 0.59 for beverages, with 0.46 for sugar-sweetened beverages. Spearman rank correlation coefficients for fruits, vegetables, and sweetened food were 0.30, 0.33, and 0.30, respectively. Although observation of the Bland-Altman plots and linear regression analyses showed a slight upward trend in mean differences, with increasing mean intake for five beverage groups, at least 90% of data plots fell within the limits of agreement for all food/beverage groups. The Child Food and Beverage Intake Questionnaire

  2. A 7-year follow-up of multidisciplinary rehabilitation among chronic neck and back pain patients. Is sick leave outcome dependent on psychologically derived patient groups?

    Science.gov (United States)

    Bergström, Gunnar; Bergström, Cecilia; Hagberg, Jan; Bodin, Lennart; Jensen, Irene

    2010-04-01

    A valid method for classifying chronic pain patients into more homogenous groups could be useful for treatment planning, that is, which treatment is effective for which patient, and as a marker when evaluating treatment outcome. One instrument that has been used to derive subgroups of patients is the Multidimensional Pain Inventory (MPI). The primary aim of this study was to evaluate a classification method based on the Swedish version of the MPI, the MPI-S, to predict sick leave among chronic neck and back pain patients for a period of 7 years after vocational rehabilitation. As hypothesized, dysfunctional patients (DYS), according to the MPI-S, showed a higher amount of sickness absence and disability pension expressed in days than adaptive copers (AC) during the 7-years follow-up period, even when adjusting for sickness absence prior to rehabilitation (355.8days, 95% confidence interval, 71.7; 639.9). Forty percent of DYS patients and 26.7% of AC patients received disability pension during the follow-up period. However, this difference was not statistically significant. Further analyses showed that the difference between patient groups was most pronounced among patients with more than 60days of sickness absence prior to rehabilitation. Cost-effectiveness calculations indicated that the DYS patients showed an increase in production loss compared to AC patients. The present study yields support for the prognostic value of this subgroup classification method concerning long-term outcome on sick leave following this type of vocational rehabilitation. Copyright (c) 2009 European Federation of International Association for the Study of Pain Chapters. Published by Elsevier Ltd. All rights reserved.

  3. Human rotavirus group a serotypes causing gastroenteritis in children less than 5 years and HIV-infected adults in Viwandani slum, Nairobi.

    Science.gov (United States)

    Raini, S K; Nyangao, J; Kombich, J; Sang, C; Gikonyo, J; Ongus, J R; Odari, E O

    2015-01-01

    Rotavirus remains a leading cause of acute gastroenteritis in children worldwide with an estimated 2000 deaths each day in developing countries. Due to HIV/AIDS scourge in Kenya, it is possible that rotavirus-related gastroenteritis has been aggravated in adults. The Global Alliance for Immunizations has ranked rotavirus infection a priority for vaccine, and, to ensure its success, there is a need to document the local strain(s) circulating in different regions. A cross-sectional study was conducted to document human rotavirus group A serotypes in children below 5 years and HIV-infected adults in Viwandani slum in Nairobi, Kenya. A total of 260 (128 from children and 132 from HIV infected adults) fecal specimen samples were analyzed from August 2012 to July 2013. Screening for rotavirus was done by antigen based enzyme immune-sorbent assay (ELISA), Polyacrylamide gel electrophoresis (PAGE) was used to detect rotavirus electropherotypes and finally genotyping was done by RT-PCR using genotype-specific primer sets targeting VP4 and VP7 genes. Rotavirus was detected in 23% and 8% of children and adult, respectively. Prevalence was high in children of 48 years. Long electropherotypes accounted for 80% and 60% while short electropherotypes accounted for 20% and 40% in children and adult, respectively. The common globally distributed strains, G1 and G3, accounted for 60% detections while the unusual G9 strain accounted for 80% infection in adults. G1P[8] was the common genotypic combination in children, accounting for 40% infection, whereas G9 [P8] accounted for 60% of the infections in adults. This study shows the existence of strain diversity between rotavirus circulating in children and adults within this study group. It further shows that as currently constituted, the 2 vaccines recommended for rotavirus would cover the circulating strain in Viwandani slum. Finally, there is a need for continuous rotavirus strain surveillance in children and a further focus on HIV

  4. [Epidemiological study on thalassemia among the children of 0 - 7 years old among the six ethnic groups in Xishuangbanna and Dehong of Yunnan province].

    Science.gov (United States)

    Zhao, Zhong-Ming; Yao, Li-Qin; Fan, Li-Mei; Zou, Tuan-Biao; Chen, Qian; Hu, Li-Sha; Yang, Fa-Bin; Liu, Jin-Tao; Wang, Xing-Tian

    2011-04-01

    To investigate the prevalence rate of thalassemia among children of 0 - 7 years old, from six ethnic groups in Xishuangbanna and Dehong, Yunnan province. 4973 blood samples from children under 7 years old were automatically undergone blood cell count, red cell osmotic fragility and hemoglobin electrophoresis testings. The incidence rates of thalassaemia, β-thalassemia was 37.4%, and α-thalassaemia were 22.6% and 14.7% respectively. The thalassaemia incidence rates were significantly different among age groups but not in gender. The incidence of α-thalassaemia was decreasing along with the increase of age, while the incidence of β-thalassaemia was increasing along with the increase of age. Xishuangbanna had the higher incidence than in Dehong and the differences were significant between counties, The incidence of thalassemia of Mengla ranked the first (52.2%) in Xishuangbanna, The differences between different regions and different nationalities were significant, with β-thalassemia of Achang ranked the first (40.6%), The incidence of α-thalassemia among Han ranked the first as 45.5% while α-thalassaemia and β-thalassemia were different in regions. α-thalassaemia and β-thalassemia were significantly different between different ethnic people in the same regions. Multiple factor analysis showed that region seemed to be a risk factor and the mother's ethnicity was a protective factor and dependent variable on thalassaemia. The incidence of thalassaemia in Yunnan Xishuangbanna and Dehong was high among children under the age of 7 and were related to ethnic and regional differences in the areas. Specific genes were proliferated along with the extension of time. Our data provided valuable information on prevention and genetic studies on thalassaemia in the minorities of Xishuangbanna and Dehong in Yunnan province.

  5. [Recommendations for prevention of community-acquired pneumonia with bacteremia as the leading form of invasive pneumococcal infections in the population of people over 50 years of age and risk groups above 19 years of age].

    Science.gov (United States)

    Albrecht, Piotr; Antczak, Adam; Hryniewicz, Waleria; Skoczyńska, Anna; Radzikowski, Andrzej; Kedziora-Kornatowska, Kornelia; Bernatowska, Ewa; Stompór, Tomasz; Grodzicki, Tomasz; Gyrczuk, Ewa; Imiela, Jacek; Jedrzejczak, Wiesław; Windak, Adam

    2014-02-01

    risk groups in the age > 19 years. At these work research findings were described above PPV23 and PCV13 at adults and world recommendations of applying both vaccines in risk groups from 19 years up to the advanced years. Also Polish recommendations of optimum applying of these vaccines were presented. They are recommending applying PCV13 at first in them, while PPV23, if to her readings exist should be given to > or = 8 of weeks from PCV13. In persons > or = 19 years which earlier received 1 or should receive more PPV23 doses first PCV13 dose should be given after the year or later than the last PPV23 dose, and then again PPV23 > or = 8 of weeks from PCV13 and the second PPV23 dose not earlier than 5 years from last PPV23. If the PPV23 application seems to be justified, it is irrespective of the more previous state vaccination against pneumococci, PCV13 should be given to as first.

  6. Three-dimensional preservation of cellular and subcellular structures suggests 1.6 billion-year-old crown-group red algae.

    Science.gov (United States)

    Bengtson, Stefan; Sallstedt, Therese; Belivanova, Veneta; Whitehouse, Martin

    2017-03-01

    The ~1.6 Ga Tirohan Dolomite of the Lower Vindhyan in central India contains phosphatized stromatolitic microbialites. We report from there uniquely well-preserved fossils interpreted as probable crown-group rhodophytes (red algae). The filamentous form Rafatazmia chitrakootensis n. gen, n. sp. has uniserial rows of large cells and grows through diffusely distributed septation. Each cell has a centrally suspended, conspicuous rhomboidal disk interpreted as a pyrenoid. The septa between the cells have central structures that may represent pit connections and pit plugs. Another filamentous form, Denaricion mendax n. gen., n. sp., has coin-like cells reminiscent of those in large sulfur-oxidizing bacteria but much more recalcitrant than the liquid-vacuole-filled cells of the latter. There are also resemblances with oscillatoriacean cyanobacteria, although cell volumes in the latter are much smaller. The wider affinities of Denaricion are uncertain. Ramathallus lobatus n. gen., n. sp. is a lobate sessile alga with pseudoparenchymatous thallus, "cell fountains," and apical growth, suggesting florideophycean affinity. If these inferences are correct, Rafatazmia and Ramathallus represent crown-group multicellular rhodophytes, antedating the oldest previously accepted red alga in the fossil record by about 400 million years.

  7. The Influence of Daily Stress on Sedentary Behavior: Group and Person (N of 1) Level Results of a 1-Year Observational Study.

    Science.gov (United States)

    Diaz, Keith M; Thanataveerat, Anusorn; Parsons, Faith E; Yoon, Sunmoo; Cheung, Ying Kuen; Alcantara, Carmela; Duran, Andrea T; Ensari, Ipek; Krupka, David J; Schwartz, Joseph E; Burg, Matthew M; Davidson, Karina W

    2018-05-24

    The purpose of this study, which used mobile technologies to continuously collect data over 1 year, was to examine the association of psychological stress with objectively measured sedentary behavior in adults at both the group (e.g. nomothetic approach) and individual (e.g. idiographic approach) level. Data were collected in an observational study of healthy adults (n=79) residing in the New York City metro area who were studied for 365 days from 2014-2015. Sedentary behavior was objectively measured via accelerometry. A smartphone-based electronic diary was used to assess level of stress ("Overall, how stressful was your day?"; 0-10 scale) and sources of stress. The end-of-day stress rating was not associated with total sedentary time (B= -1.34, p=0.767) at the group-level. When specific sources of stress were evaluated at the group-level, argument-related stress was associated with increased sedentariness; while running late- and work-related stress were associated with decreased sedentariness. There was a substantial degree of inter-individual variability in the relationship of stress with sedentary behavior. Both the level and sources of stress were associated with increased sedentariness for some, decreased sedentariness for others, and had no effect for many (within-person variance p-value stress on sedentary behavior varies by source of stress and from person-to-person. A precision medicine approach may be warranted to target reductions in sedentary time; although further studies are needed to confirm the observed findings in light of study limitations including a small sample size and enrollment of participants from a single, urban metropolitan area.

  8. The Utility of Focus Group Interviews to Capture Dietary Consumption Data in the Distant Past: Dairy Consumption in Kazakhstan Villages 50 Years Ago

    Science.gov (United States)

    Schwerin, Michael; Schonfeld, Sara; Drozdovitch, Vladimir; Akimzhanov, Kuat; Aldyngurov, Daulet; Bouville, André; Land, Charles; Luckyanov, Nicholas; Mabuchi, Kiyohiko; Semenova, Yulia; Simon, Steven; Tokaeva, Alma; Zhumadilov, Zhaxybay; Potischman, Nancy

    2013-01-01

    From 1949 to 1962, residents of several villages in Kazakhstan Abstract: received substantial doses of radiation to the thyroid gland resulting from nuclear tests conducted at the Semipalatinsk Nuclear Test Site. The primary source of radiation was internal from an intake of radioactive iodine by consumption of contaminated dairy products. A previous research study of childhood exposure and thyroid disease in this region gathered limited data on study participants’ dairy intake at the time of the fallout for the purpose of estimating past radiation doses. Because many subjects were too young at the time of the nuclear tests to recall dietary consumption and existing sources of archival data are limited, it was necessary to interview parents and other village residents who cared for children during this time; older adults ranging in age from 75 to 90 years old. Results from 11 focus group interviews conducted in 2007 with 82 women from 4 villages in Kazakhstan yielded group-level estimates of age-, gender-, ethnicity- and village-specific dairy consumption patterns in rural Kazakhstan during the 1950s. Children typically consumed cow’s milk with limited consumption of mare, goat, and sheep milk; and consumed dairy products such as sour milk (airan), soft cottage cheese (tvorog), and fermented mare milk (koumiss) with the greatest amounts of koumiss reported at ages 15–21. The consumption patterns differed by age and between Kazakh and Russian children, which should lead to different estimates of radiation exposure to the thyroid. This study demonstrated the utility of focus groups to obtain quantitative estimates for dietary intake in the distant past. PMID:24286002

  9. What have we learned from reporting safety incidents in the Surgical Block?: Cross-sectional descriptive study of two-years of activity of a multidisciplinary analytical group.

    Science.gov (United States)

    Caba Barrientos, F; Rodríguez Morillo, A; Galisteo Domínguez, R; Del Nozal Nalda, M; Almeida González, C V; Echevarría Moreno, M

    2018-05-01

    Incident Reporting Systems (IRS) are considered a tool that facilitates learning and safety culture. Using the experience gained with SENSAR, we evaluated the feasibility and the activity of a multidisciplinary group analyzing incidents in the surgical patient notified to a general community system, that of the Observatory for Patient Safety (OPS). Cross-sectional observational study planned for two years. After training in the analysis, a multidisciplinary group was created in terms of specialties and professional categories, which would analyze the incidents in the surgical patient notified to the OPS. Incidents are classified and their circumstances analyzed. Between March 2015 and 2017, 95 incidents were reported (4 by non-professionals). Doctors reported more than nurses, at 54 (56.84%) vs. 37 (38.94%). The anaesthesia unit reported most at 46 (48.42%) (P=.025). The types of incidents mainly related to the care procedure (30.52%); to the preoperative period (42.10%); and to the place, the surgical area (48.42%). Significant differences were detected according to the origin of the notifier (P=.03). No harm, or minor morbidity, constituted 88% of the incidents. Errors were identified in 79%. The analysis of the incidents directed the measures to be taken. The activity undertaken by the multidisciplinary analytical group during the period of study facilitated knowledge of the system among the professionals and enabled the identification of areas for improvement in the Surgical Block at different levels. Copyright © 2017 Sociedad Española de Anestesiología, Reanimación y Terapéutica del Dolor. Publicado por Elsevier España, S.L.U. All rights reserved.

  10. Feasibility of Group Schema Therapy for Outpatients with Severe Borderline Personality Disorder in Germany: A Pilot Study with Three Year Follow-Up

    Science.gov (United States)

    Fassbinder, Eva; Schuetze, Maren; Kranich, Annika; Sipos, Valerija; Hohagen, Fritz; Shaw, Ida; Farrell, Joan; Arntz, Arnoud; Schweiger, Ulrich

    2016-01-01

    Borderline Personality Disorder (BPD) is a severe, challenging to treat mental disorder. Schema therapy (ST) as an individual therapy has been proven to be an effective psychological treatment for BPD. A group format of ST (GST) has been developed and evaluated in a randomized controlled trial in the United States and piloted in The Netherlands. These results suggest that GST speeds up and amplifies treatment effects of ST and might reduce delivery costs. However, feasibility in the German health care system and with BPD patients with high BPD severity and comorbidity, and frequent hospitalization, has not been tested to date. We investigated GST in 10 severely impaired, highly comorbid female patients with BPD, that needed frequent hospital admission. Patients received an outpatient ST-treatment program with weekly group and individual sessions for 1 year. Outcome measures including BPD severity, general psychopathology, psychosocial functioning, quality of life, happiness, schemas, and modes, and days of hospitalization were assessed at the start of treatment and 6, 12, and 36 months later with semi-structured interviews and self-report measures. We observed significant decreases in severity of BPD symptoms, general symptom severity, dysfunctional BPD-specific modes and schemas, and days of hospitalization. Functional modes, quality of live and happiness improved. The results of this feasibility study are promising and encourage further implementation of ST outpatient treatment programs even for patients with severe BPD and high hospitalization risk. However, small sample size and the missing of a control group do not allow the generalizability of these findings. PMID:27933020

  11. Feasibility of group schema therapy for outpatients with severe borderline personality disorder in Germany: A pilot study with three year follow-up

    Directory of Open Access Journals (Sweden)

    Eva Fassbinder

    2016-11-01

    Full Text Available Borderline Personality Disorder (BPD is a severe, challenging to treat mental disorder. Schema therapy (ST as an individual therapy has been proven to be an effective psychological treatment for BPD. A group format of ST (GST has been developed and evaluated in a randomized controlled trial in the United States and piloted in The Netherlands. These results suggest that GST speeds up and amplifies treatment effects of ST and might reduce delivery costs. However, feasibility in the German health care system and with BPD patients with high BPD severity and comorbidity, and frequent hospitalization, has not been tested to date. We investigated GST in ten severely impaired, highly comorbid female patients with BPD, that needed frequent hospital admission. Patients received an outpatient ST-treatment program with weekly group and individual sessions for one year. Outcome measures including BPD severity, general psychopathology, psychosocial functioning, quality of life, happiness, schemas and modes, and days of hospitalization were assessed at the start of treatment and six, twelve and 36 months later with semi-structured interviews and self-report measures. We observed significant decreases in severity of BPD symptoms, general symptom severity, dysfunctional BPD-specific modes and schemas, and days of hospitalization. Functional modes, quality of live and happiness improved. The results of this feasibility study are promising and encourage further implementation of ST outpatient treatment programs even for patients with severe BPD and high hospitalization risk. However, small sample size and the missing of a control group do not allow the generalizability of these findings.

  12. Six years' experience with prostaglandin I2 infusion in elective open repair of abdominal aortic aneurysm: a parallel group observational study in a tertiary referral vascular center.

    LENUS (Irish Health Repository)

    Beirne, Chris

    2008-11-01

    The prostaglandin I(2) (PGI(2)) analogue iloprost, a potent vasodilator and inhibitor of platelet activation, has traditionally been utilized in pulmonary hypertension and off-label use for revascularization of chronic critical lower limb ischemia. This study was designed to assess the effect of 72 hr iloprost infusion on systemic ischemia post-open elective abdominal aortic aneurysm (EAAA) surgery. Between January 2000 and 2007, 104 patients undergoing open EAAA were identified: 36 had juxtarenal, 15 had suprarenal, and 53 had infrarenal aneurysms, with a mean maximal diameter of 6.9 cm. The male-to-female ratio was 2.5:1, with a mean age of 71.9 years. No statistically significant difference was seen between the study groups with regard to age, sex, risk factors, American Society of Anesthesiologists (ASA) grade, or diameter of aneurysm repaired. All emergency, urgent, and endovascular procedures for aneurysms were excluded. Fifty-seven patients received iloprost infusion for 72 hr in the immediate postoperative period compared with 47 patients who did not. Patients were monitored for signs of pulmonary, renal, cardiac, systemic ischemia, and postoperative intensive care unit (ICU) morbidity. Statistically significantly increased ventilation rates (p=0.0048), pulmonary complication rates (p=0.0019), and myocardial ischemia (p=0.0446) were noted in those patients not receiving iloprost. These patients also had significantly higher renal indices including estimate glomerular filtration rate changes (p=0.041) and postoperative urea level rises (p=0.0286). Peripheral limb trashing was noted in five patients (11.6%) in the non-iloprost group compared with no patients who received iloprost. Increased rates of transfusion requirements and bowel complications were noted in those who did not receive iloprost, with their ICU stay greater than twice that of iloprost patients. All-cause morbidity affected 67% of patients not receiving iloprost compared to 40% who did

  13. Electrochemical properties of LaNi{sub 4.2}Co{sub 0.4}Zn{sub 0.1}Al{sub 0.3} and LaNi{sub 4.3}Co{sub 0.4}Zn{sub 0.1}Al{sub 0.2} alloys as anode materials for Ni-MH batteries

    Energy Technology Data Exchange (ETDEWEB)

    Giza, Krystyna [Czestochowa Univ. of Technology (Poland). Faculty of Production Engineering and Materials Technology

    2017-07-01

    The galvanostatic charge and discharge technique was used for the evaluation of the changes in electrochemical parameters of the tested metal hydride electrodes during the repeated hydrogen absorption and desorption processes. Higher development of the effective surface area during hydrogenation has been obtained for LaNi{sub 4.3}Co{sub 0.4}Zn{sub 0.1}Al{sub 0.2} composite electrode. For the conditions of current ± 0.5 C, the discharge capacities of LaNi{sub 4.2}Co{sub 0.4}Zn{sub 0.1}Al{sub 0.3} and LaNi{sub 4.3}Co{sub 0.4}Zn{sub 0.1}Al{sub 0.2} alloys are 240 and 316 mAh x g{sup -1}, respectively. From the point of view of improving the kinetics of the process of charge transfer at the electrode/electrolyte interface as well as a resistance to self-discharging, a partial substitution of nickel with zinc in the LaNi{sub 4.3}Co{sub 0.4}Al{sub 0.3} alloy is not favorable.

  14. Design and fabrication of a GaAs/Al0.4Ga0.6As micro-accelerometer based on piezoresistive effect

    International Nuclear Information System (INIS)

    Liu Guowen; Zhang Binzhen; Zhang Kairui

    2009-01-01

    In this paper, a novel piezoresistive accelerometer based on the piezoresistive effect of GaAs/Al 0.4 Ga 0.6 As thin films was designed. The piezoresistive accelerometer contains four suspended flexural beams and a central proof mass configuration. The piezoresistive effect of a piezoresistor or thin film was used to make a resistor changing the output that is proportional to applied acceleration. The GaAs-based piezoresistive accelerometer was prepared with advanced surface micromachining processes, and bulk micromachining processes. Finally, the static pressure experiments were conducted on the sensing element. The experimental results showed that the combined semiconductor heterostructures and mechanical cantilevers have a good stress sensitive characteristic. The integration of these technologies promises to bring about a revolution in the applications of the semiconductor fine-structure devices.

  15. Design and fabrication of a GaAs/Al{sub 0.4}Ga{sub 0.6}As micro-accelerometer based on piezoresistive effect

    Energy Technology Data Exchange (ETDEWEB)

    Liu Guowen; Zhang Binzhen; Zhang Kairui [National Key Laboratory for Electronic Measurement Technology, North University of China Taiyuan, Shanxi, 030051 (China)], E-mail: jacky.mucklow@iop.org

    2009-03-01

    In this paper, a novel piezoresistive accelerometer based on the piezoresistive effect of GaAs/Al{sub 0.4}Ga{sub 0.6}As thin films was designed. The piezoresistive accelerometer contains four suspended flexural beams and a central proof mass configuration. The piezoresistive effect of a piezoresistor or thin film was used to make a resistor changing the output that is proportional to applied acceleration. The GaAs-based piezoresistive accelerometer was prepared with advanced surface micromachining processes, and bulk micromachining processes. Finally, the static pressure experiments were conducted on the sensing element. The experimental results showed that the combined semiconductor heterostructures and mechanical cantilevers have a good stress sensitive characteristic. The integration of these technologies promises to bring about a revolution in the applications of the semiconductor fine-structure devices.

  16. Artificial neural network analysis of RBS data with roughness: Application to Ti{sub 0.4}Al{sub 0.6}N/Mo multilayers

    Energy Technology Data Exchange (ETDEWEB)

    Oehl, G.; Matias, V.; Vieira, A.; Barradas, N.P. E-mail: nunoni@itn.mces.pt

    2003-10-01

    In multilayered Ti{sub 0.4}Al{sub 0.6}N/Mo coatings, a strengthening effect can be obtained by using alternate layers of materials with high and low elastic constants. This behaviour requires a multilayer periodicity below a certain value in order to reduce dislocation motion across layer interface. Below this critical period, in most cases the hardness decreases as the period decreases. The multiple interfaces have an important role on this behaviour, working as stress relaxation areas and preventing crack propagation, influencing the mechanical properties of the system. Understanding the origin of these effects requires knowledge of the interface structure, where the interfacial roughness is of prime importance. We used Rutherford backscattering to study roughness in a quantitative way, and developed an artificial neural network algorithm dedicated to the analysis of the data. The results compare very well with previous TEM and AFM data.

  17. Improvement of critical current density in thallium-based (Tl, Bi)Sr1.6Ba0.4Ca2Cu3O9-δ superconductors

    International Nuclear Information System (INIS)

    Ren, Z.F.; Wang, C.A.; Wang, J.H.

    1994-07-01

    Epitaxial (Tl,Bi)Sr 1.6 Ba 0.4 Ca 2 Cu 3 O x ((Tl, Bi)-1223) thin films on (100) single crystal LaAlO 3 substrates were synthesized by a two-step procedure. Phase development, microstructure, and relationships between film and substrate were studied by x-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Resistance versus temperature, zero-field-cooled and field-cooled magnetization, and transport critical current density (J c ) were measured. The zero-resistance temperature was 105--111 K. J c at 77 K and zero field was >2 x 10 6 A/cm 2 . The films exhibited good flux pinning properties

  18. Improvement of critical current density in thallium-based (Tl,Bi)Sr1.6Ba0.4Ca2Cu3Ox superconductors

    International Nuclear Information System (INIS)

    Ren, Z.F.; Wang, C.A.; Wang, J.H.

    1994-01-01

    Epitaxial (Tl,Bi)Sr 1.6 Ba 0.4 Ca 2 Cu 3 O x (Tl,Bi)-1223 thin films on (100) single crystal LaAlO 3 substrates were synthesized by a two-step procedure. Phase development, microstructure, and relationships between film and substrate were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Resistance versus temperature, zero-field-cooled and field-cooled magnetization, and transport critical current density (J c ) were measured. The zero-resistance temperature was 105-111 K. J c at 77 K and zero field was > 2 x 10 6 A/cm 2 . The films exhibited good flux pinning properties

  19. Superconducting Cd and Ca doped 123 phase in Cdo.8Ba2(Y0.7Ca0.4) Cu3.5Oy

    International Nuclear Information System (INIS)

    Balchev, N.; Kovachev, V; THOMAS, J.; BIEGER, W.; Konstantinov, K.; Kunev, B.

    1999-01-01

    A new Cd-containing superconductor with nominal composition of Cd 0.8 Ba 2 (Y 0.7 Ca 0.4 ) Cu 3.5 O y and T c = 80 K was synthesized and investigated. The obtained XRD pattern shows that the dominating phase is an orthorhombic 123. It was shown that the presence of Cd and Ca facilitates the 123 phase formation. The results of the EDX analysis on SEM and TEM have shown that the distribution of the Cd and Ca in the samples is inhomogeneous. The two elements enter the 123 phase in most of the investigated crystals and form a new Cd-Ba-Y-Ca-Cu-O superconducting compound

  20. Gd0.6Sr0.4Fe0.8Co0.2O3-δ: A novel type of SOFC cathode

    DEFF Research Database (Denmark)

    Kammer Hansen, Kent; Søgaard, Martin; Mogensen, Mogens Bjerg

    2007-01-01

    The fabrication and electrochemical activity of a type of solid oxide fuel cell (SOFC) cathode is described in this paper. In search of new cathodes a Gd0.6Sr0.4Fe0.8Co0.2O3-delta compound was synthesized using the glycine-nitrate method. It turned out that this was a two-phase compound consisting...... of two perovskite phases, a cubic and an orthorhombic phase, as shown by Rietveld refinements. These two phases were synthesized and a cone-shaped electrode study was undertaken. It was shown that the composite cathode had an electrochemical activity superior to that of the two single-phase perovskites......, indicating that the unique microstructure of this type of cathode is essential for achieving high electrochemical activity toward the reduction of oxygen in a SOFC....

  1. Structural characterization, morphology and magnetic ferrite Ni_0_,_4Zn_0_,_5Fe_2Cu_0_,_1O_4

    International Nuclear Information System (INIS)

    Santos, P.T.A.; Fernandes, P.C.; Santos, P.T.A.; Costa, A.C.F.M.

    2011-01-01

    In this work the system Ni_0_,_4Zn_0_,_5Fe_2Cu_0_,_1O_4 was obtained by combustion reaction using urea as fuel in order to evaluate their structural characteristics, and morphological imaging. The resulting samples were characterized by XRD, BET, SEM / EDS and magnetic measurements. The synthesis by combustion reaction was effective for producing samples of ferrites with crystallite size 13 nm. The X-ray diffraction showed the major phase of the inverse spinel and traces of ZnO second phase. The resulting morphology showed the formation of soft agglomerates with interparticle porosity, and mapping by SEM / EDS indicated a good distribution of elements Ni, Cu, Zn, Fe and O constituent of ferrite. The ferrite showed superparamagnetic behavior with a value of saturation magnetization of 5.60 emu / g. (author)

  2. Measurement of the neutron-capture cross section on 63,65Cu between 0.4 and 7.5 MeV

    Science.gov (United States)

    Bray, Isabel; Bhike, Megha; Krishichayan, (None); Tornow, W.

    2015-10-01

    Copper is currently being used as a cooling and shielding material in most experimental searches for 0 ν β β decay. In order to accurately interpret background events in these experiments, the cross section of neutron-induced reactions on copper must be known. The purpose of this work was to measure the cross section of the 63,65Cu(n, γ)64,66Cu reactions. Data were collected through the activation method at a range of energies from approximately 0.4 MeV to 7.5 MeV, employing the neutron production reactions 3H(p,n)3Heand2H(d,n)3He. Previous data were limited to energies below approximately 3 MeV. The results are compared to predictions from the nuclear data libraries ENDF/B-VII.1 and TENDL-2014.

  3. Measurements of the 40Ar(n, γ)41Ar radiative-capture cross section between 0.4 and 14.8 MeV

    Science.gov (United States)

    Bhike, Megha; Fallin, B.; Tornow, W.

    2014-09-01

    The 40Ar(n, γ)41Ar neutron capture cross section has been measured between 0.4 and 14.8 MeV neutron energy using the activation technique. The data are important for estimating backgrounds in argon-based neutrino and dark-matter detectors and in the neutrino-less double-beta decay search GERDA, which uses liquid argon as cooling and shielding medium. For the first time the 40Ar(n, γ)41Ar cross section has been measured for neutron energies above 1 MeV. Our results are compared to the evaluation ENDF/B-VII.1 and the calculated prediction TENDL-2013. The latter agrees very well with the present results.

  4. Enhanced superconductivity and anisotropy of FeTe0.6Se0.4 single crystals with Li -NH3 intercalation

    Science.gov (United States)

    Li, Chenghe; Sun, Shanshan; Wang, Shaohua; Lei, Hechang

    2017-10-01

    We report a systematic study of anisotropy resistivity, magnetoresistance, and Hall effect of Li0.32(NH3)yFe2Te1.2Se0.8 single crystals. When compared to the parent compound FeTe0.6Se0.4 , the Li-NH3 intercalation not only increases the superconducting transition temperature but also enhances the electronic anisotropy in both normal and superconducting states. Moreover, in contrast to the parent compound, the Hall coefficient RH becomes negative at low temperature, indicating electron-type carriers are dominant due to Li doping. On the other hand, the sign reverse of RH at high temperature and the failure of scaling behavior of magnetoresistance imply that hole pockets may be still crossing or just below the Fermi energy level, leading to the multiband behavior in Li0.32(NH3)yFe2Te1.2Se0.8 .

  5. Some characteristics of protons emitted in backward hemisphere in dTa and CTa interactions at Psub(0)=4.2 GeV/c

    International Nuclear Information System (INIS)

    Gasparyan, A.P.; Mekhtiev, R.R.

    1985-01-01

    In interactions of deuterium and carbon relativistic nuclei with tantalum at P 0 =4.2 GeV/c for secondary protons with 100 deg emission angle in lab. system, the temperature of proton kinetic energy spectra in three angle intervals has been determined. It does not contradict the values obtained in hadron-nuclear interactions. The slope parameters for backward emitted proton spectra over comulative variable β=/E-psub(11) msub(p) in dTa and CTa collisions and hadron-nucleus interactions are approximately equal as well. At the same time some difference of s: ope parameters on kinetic energy and cumulative variables spectra between dTa and CTa is observed. In CTa collisions the spectra are deeper. The comparison with the predictions of cascade model for CTa interactions is made. The cascade model taking into account the final state interaction of nucleons on the whole satisfactorily describes the experimental data

  6. Inhomogeneous nucleation and domain wall motion with Barkhausen avalanches in epitaxial PbZr0.4Ti0.6O3 thin films

    International Nuclear Information System (INIS)

    Yang, Sang Mo; Kim, Hun Ho; Kim, Tae Heon; Kim, Ik Joo; Yoon, Jong Gul

    2012-01-01

    We investigated the ferroelectric (FE) domain nucleation and domain wall motion in epitaxial PbZr 0.4 Ti 0.6 O 3 capacitors by using modified piezoresponse force microscopy with the domain-tracing method. From time-dependent FE domain evolution images, we observed that defect-mediated inhomogeneous nucleation occurred with a stochastic nature. In addition, we found that the number of nuclei N(t) was linearly proportional to log t, where t is the accumulated time of the applied pulse fields. The time-dependence of N(t) suggests a distribution of energy barriers for nucleation, which may determine the stochastic nature of domain nucleation. We also observed that the domain grew with consecutive Barkhausen avalanches and that the growth direction became anisotropic when the domain radius was larger than a critical radius of about 100 nm.

  7. Isotropic Kink and Quasiparticle Excitations in the Three-Dimensional Perovskite Manganite La_{0.6}Sr_{0.4}MnO_{3}.

    Science.gov (United States)

    Horiba, Koji; Kitamura, Miho; Yoshimatsu, Kohei; Minohara, Makoto; Sakai, Enju; Kobayashi, Masaki; Fujimori, Atsushi; Kumigashira, Hiroshi

    2016-02-19

    In order to reveal the many-body interactions in three-dimensional perovskite manganites that show colossal magnetoresistance, we performed an in situ angle-resolved photoemission spectroscopy on La_{0.6}Sr_{0.4}MnO_{3} and investigated the behavior of quasiparticles. We observed quasiparticle peaks near the Fermi momentum in both the electron and the hole bands, and clear kinks throughout the entire hole Fermi surface in the band dispersion. This isotropic behavior of quasiparticles and kinks suggests that polaronic quasiparticles produced by the coupling of electrons with Jahn-Teller phonons play an important role in the colossal magnetoresistance properties of the ferromagnetic metallic phase of three-dimensional manganites.

  8. Longitudinal aerodynamic characteristics of a wing-winglet model designed at M = 0.8, C sub L = 0.4 using linear aerodynamic theory

    Science.gov (United States)

    Kuhlman, J. M.

    1983-01-01

    Wind tunnel test results have been presented herein for a subsonic transport type wing fitted with winglets. Wind planform was chosen to be representative of wings used on current jet transport aircraft, while wing and winglet camber surfaces were designed using two different linear aerodynamic design methods. The purpose of the wind tunnel investigation was to determine the effectiveness of these linear aerodynamic design computer codes in designing a non-planar transport configuration which would cruise efficiently. The design lift coefficient was chosen to be 0.4, at a design Mach number of 0.8. Force and limited pressure data were obtained for the basic wing, and for the wing fitted with the two different winglet designs, at Mach numbers of 0.60, 0.70, 0.75 and 0.80 over an angle of attack range of -2 to +6 degrees, at zero sideslip. The data have been presented without analysis to expedite publication.

  9. Structural and optical properties of annealed and illuminated (Ag3AsS3)0.6(As2S3)0.4 thin films

    Science.gov (United States)

    Studenyak, I. P.; Neimet, Yu. Yu.; Rati, Y. Y.; Stanko, D.; Kranjčec, M.; Kökényesi, S.; Daróci, L.; Bohdan, R.

    2014-11-01

    (Ag3AsS3)0.6(As2S3)0.4 thin films were deposited upon a quartz substrate by rapid thermal evaporation. Structural studies of the as-deposited, annealed and illuminated films were performed using XRD, scanning electron and atomic force microscopies. Surfaces of all the films were found to be covered with Ag-rich crystalline micrometer sized cones. Thermal annealing leads to mechanical deformation of part of the cones and their detachment from the base film surface while the laser illumination leads to the new formations appearance on the surface of thin films. The spectroscopic studies of optical transmission spectra for as-deposited, annealed and illuminated thin films were carried out. The optical absorption spectra in the region of its exponential behaviour were analysed, the dispersion dependences of refractive index as well as their variation after annealing and illumination were investigated.

  10. Stress-induced metallic behavior under magnetic field in Pr1-xCaxMnO3 (x=0.5 and 0.4) thin films (invited)

    International Nuclear Information System (INIS)

    Prellier, W.; Simon, Ch.; Mercey, B.; Hervieu, M.; Haghiri-Gosnet, A. M.; Saurel, D.; Lecoeur, Ph.; Raveau, B.

    2001-01-01

    We have investigated the role of the stress induced by the presence of the substrate in thin films of colossal magnetoresistive manganites on structural, resistive, and magnetic properties. Because of the strong coupling between the small structural distortions related to the charge ordering (CO) and the resistive properties, the presence of the substrate prevents the full development of the charge ordering in Pr 0.5 Ca 0.5 MnO 3 , especially in the very thin films. For thicker films, the CO state exists, but is not fully developed. Correlatively, the magnetic field which is necessary to suppress the CO is decreased drastically from 25 T to about 5 T on SrTiO 3 substrates. We have also investigated the influence of the doping level by studying the case of Pr 0.6 Ca 0.4 MnO 3 . [copyright] 2001 American Institute of Physics

  11. Charge and structural ordering in the brownmillerite phases: La1-xSrxMnO2.5 (0.20.4)

    International Nuclear Information System (INIS)

    Casey, Peter S.; Barker, Daniel; Hayward, Michael A.

    2006-01-01

    The topotactic reduction of La 1-x Sr x MnO 3 (0.2 1-x Sr x MnO 2.5 brownmillerite phases with NaH is described. Neutron and electron diffraction data show the x=0.25 and 0.2 phases adopt structures with an unusual ordered L-R-L-R alternation of twisted chains of Mn(II) tetrahedra within each anion-deficient layer. This is accompanied by Mn(II)/(III) charge ordering within the remaining MnO 6 octahedral layers. In contrast, the x=0.4 phase adopts a structure in which the twisted chains of tetrahedra are disordered

  12. Microstructural and dielectric properties of Ba0.6Sr0.4Ti1-xZrxO3 based combinatorial thin film capacitors library

    International Nuclear Information System (INIS)

    Liu Guozhen; Wolfman, Jerome; Autret-Lambert, Cecile; Sakai, Joe; Roger, Sylvain; Gervais, Monique; Gervais, Francois

    2010-01-01

    Epitaxial growth of Ba 0.6 Sr 0.4 Ti 1-x Zr x O 3 (0≤x≤0.3) composition spread thin film library on SrRuO 3 /SrTiO 3 layer by combinatorial pulsed laser deposition (PLD) is reported. X-ray diffraction and energy dispersive x-ray spectroscopy studies showed an accurate control of the film phase and composition by combinatorial PLD. A complex evolution of the microstructure and morphology with composition of the library is described, resulting from the interplay between epitaxial stress, increased chemical pressure, and reduced elastic energy upon Zr doping. Statistical and temperature-related capacitive measurements across the library showed unexpected variations in the dielectric properties. Doping windows with enhanced permittivity and tunability are identified, and correlated to microstructural properties.

  13. Magnetic studies on Layered solid solution Lix(Ni0.4Mn0.6)2-xO2

    Science.gov (United States)

    Nakao, K.; Nakamura, T.; Yamada, Y.; Koshiba, N.

    2011-05-01

    Lix(Ni0.4Mn0.6)2-xO2 (1.09hydroxide as raw materials. All the compounds have a layered rock-salt structure, and the cation mixing degree (Ni2+ occupancy in the Li-layer) decreases with an increase in x. From the low-temperature magnetic measurement, they all have negative Weiss temperature and spontaneous magnetization, that is, they are ferromagnetic materials. Both the Curie temperature and the spontaneous magnetization at 4.2K decrease with an increase in x. These magnetic variations are attributed to the lowering of the cation mixing degree: the magnetic interaction network turns to two-dimensional one with the loss of the inert-layer coupling. These situations may be considered semi-quantitatively using the ferromagnetic cluster model. Additionally, the cation mixing degree has an influence on their electrochemical properties such as cycle fading and rate capability.

  14. Observation of weak coupling effects in Ba0.6 K0.4 Fe2 As2 junctions patterned across a naturally formed grain boundary

    International Nuclear Information System (INIS)

    Hong, Sung-Hak; Lee, Soon-Gul; Lee, Nam Hoon; Kang, Won Nam

    2014-01-01

    We have fabricated intergrain nanobridge junctions from a Ba 0.6 K 0.4 Fe 2 As 2 film and observed their weak coupling effects. We prepared the junction by patterning a nanobridge across a natural grain boundary by using a focused ion beam etching technique and studied their superconducting transition properties. The resistive transition showed three steps: the transitions of the bulk, the microbridge, and the junction grain boundary. Current–voltage curves showed typical Josephson junction characteristics, well-matched with the model of a resistively shunted junction incorporated with thermal fluctuations. Fitting data to theory revealed much larger current fluctuations than expected from the Johnson–Nyquist theorem. The junction showed a linear temperature dependence of the critical current and a constant normal-state resistance, indicating that the grain boundary played a role as a tunnel barrier with a very poor conductance. (paper)

  15. Recovery of oscillatory magneto-resistance in phase separated La0.3Pr0.4Ca0.3MnO3 epitaxial thin films

    International Nuclear Information System (INIS)

    Alagoz, H. S.; Jeon, J.; Mahmud, S. T.; Saber, M. M.; Chow, K. H.; Jung, J.; Prasad, B.; Egilmez, M.

    2013-01-01

    In-plane angular dependent magneto-resistance has been studied in La 0.3 Pr 0.4 Ca 0.3 MnO 3 (LPCMO) manganite thin films deposited on the (100) oriented NdGaO 3 , and (001) oriented SrTiO 3 and LaAlO 3 substrates. At temperatures where the electronic phase separation is the strongest, a metastable irreversible state exists in the films whose resistivity ρ attains a large time dependent value. The ρ decreases sharply with an increasing angle θ between the magnetic field and the current, and does not display an expected oscillatory cos 2 θ/sin 2 θ dependence for all films. The regular oscillations are recovered during repetitive sweeping of θ between 0° and 180°. We discuss possible factors that could produce these unusual changes in the resistivity

  16. Buffer layer dependence of magnetoresistance effects in Co2Fe0.4Mn0.6Si/MgO/Co50Fe50 tunnel junctions

    Science.gov (United States)

    Sun, Mingling; Kubota, Takahide; Takahashi, Shigeki; Kawato, Yoshiaki; Sonobe, Yoshiaki; Takanashi, Koki

    2018-05-01

    Buffer layer dependence of tunnel magnetoresistance (TMR) effects was investigated in Co2Fe0.4Mn0.6Si (CFMS)/MgO/Co50Fe50 magnetic tunnel junctions (MTJs). Pd, Ru and Cr were selected for the buffer layer materials, and MTJs with three different CFMS thicknesses (30, 5, and 0.8 nm) were fabricated. A maximum TMR ratio of 136% was observed in the Ru buffer layer sample with a 30-nm-thick CFMS layer. TMR ratios drastically degraded for the CFMS thickness of 0.8 nm, and the values were 26% for Cr buffer layer and less than 1% for Pd and Ru buffer layers. From the annealing temperature dependence of the TMR ratios, amounts of interdiffusion and effects from the lattice mismatch were discussed.

  17. Orientation dependence of phase diagrams and physical properties in epitaxial Ba0.6Sr0.4TiO3 films

    Science.gov (United States)

    Qiu, J. H.; Zhao, T. X.; Chen, Z. H.; Yuan, N. Y.; Ding, J. N.

    2018-04-01

    Orientation dependence of phase diagrams and physical properties of Ba0.6Sr0.4TiO3 films are investigated by using a phenomenological Landau-Devonshire theory. New ferroelectric phases, such as the tetragonal a1 phase and the orthorhombic a2 c phase in (110) oriented film and the monoclinic MA phase in (111) oriented film, appear in the "misfit strain-temperature" phase diagrams as compared with (001) oriented film. Moreover, the phase diagrams of (110) and (111) oriented films are more complex than that of (001) oriented film due to the nonlinear coupling terms appeared in the thermodynamic potential. The dielectric and piezoelectric properties largely depend on the misfit strain and orientation. (111) oriented film has the better piezoelectric property than (110) oriented film. Furthermore, the compressive misfit strain is prone to induce the larger piezoelectric property than tensile misfit strain.

  18. Measurements of the 40Ar(n, γ41Ar radiative-capture cross section between 0.4 and 14.8 MeV

    Directory of Open Access Journals (Sweden)

    Megha Bhike

    2014-09-01

    Full Text Available The 40Ar(n, γ41Ar neutron capture cross section has been measured between 0.4 and 14.8 MeV neutron energy using the activation technique. The data are important for estimating backgrounds in argon-based neutrino and dark-matter detectors and in the neutrino-less double-beta decay search GERDA, which uses liquid argon as cooling and shielding medium. For the first time the 40Ar(n, γ41Ar cross section has been measured for neutron energies above 1 MeV. Our results are compared to the evaluation ENDF/B-VII.1 and the calculated prediction TENDL-2013. The latter agrees very well with the present results.

  19. Cochrane review: behavioural and cognitive-behavioural group-based parenting programmes for early-onset conduct problems in children aged 3 to 12 years (Review).

    Science.gov (United States)

    Furlong, Mairead; McGilloway, Sinead; Bywater, Tracey; Hutchings, Judy; Smith, Susan M; Donnelly, Michael

    2013-03-07

    Early-onset child conduct problems are common and costly. A large number of studies and some previous reviews have focused on behavioural and cognitive-behavioural group-based parenting interventions, but methodological limitations are commonplace and evidence for the effectiveness and cost-effectiveness of these programmes has been unclear. To assess the effectiveness and cost-effectiveness of behavioural and cognitive-behavioural group-based parenting programmes for improving child conduct problems, parental mental health and parenting skills. We searched the following databases between 23 and 31 January 2011: CENTRAL (2011, Issue 1), MEDLINE (1950 to current), EMBASE (1980 to current), CINAHL (1982 to current), PsycINFO (1872 to current), Social Science Citation Index (1956 to current), ASSIA (1987 to current), ERIC (1966 to current), Sociological Abstracts (1963 to current), Academic Search Premier (1970 to current), Econlit (1969 to current), PEDE (1980 to current), Dissertations and Theses Abstracts (1980 to present), NHS EED (searched 31 January 2011), HEED (searched 31 January 2011), DARE (searched 31 January 2011), HTA (searched 31 January 2011), mRCT (searched 29 January 2011). We searched the following parent training websites on 31 January 2011: Triple P Library, Incredible Years Library and Parent Management Training. We also searched the reference lists of studies and reviews. We included studies if: (1) they involved randomised controlled trials (RCTs) or quasi-randomised controlled trials of behavioural and cognitive-behavioural group-based parenting interventions for parents of children aged 3 to 12 years with conduct problems, and (2) incorporated an intervention group versus a waiting list, no treatment or standard treatment control group. We only included studies that used at least one standardised instrument to measure child conduct problems. Two authors independently assessed the risk of bias in the trials and the methodological quality of

  20. Structural, dielectric and magnetic properties of Bi{sub 0.8}Ba{sub 0.2}Fe{sub 0.6}Mn{sub 0.4}O{sub 3} ceramic

    Energy Technology Data Exchange (ETDEWEB)

    Rangi, Manisha, E-mail: mrangi100@gmail.com; Sanghi, S.; Agarwal, A.; Kaswan, K.; Jangra, S.; Singh, O. [Department of Applied Physics, Guru Jambheshwar University of Science and Technology, Hisar 125001, Haryana (India)

    2016-05-23

    Polycrystalline Bi{sub 0.8}Ba{sub 0.2}Fe{sub 0.6}Mn{sub 0.4}O{sub 3} ceramic was synthesized via conventional two stage solid state reaction method. The crystal structure is examined via powder x-ray diffraction and Rietveld refinement revealed that the sample has a rhombohedral crystal structure (space group R3c). The dielectric response of the sample was analyzed in the frequency range 10 Hz to 5 MHz at different temperature. The values of dielectric constant (ε′) and dielectric loss factor (tan δ) increases with increasing temperature at different frequencies which may be the result of increase in the number of charge carriers and their mobilities due to the thermal activation. M-H hysteresis loop was recorded at room temperature up to a field of 15 kOe which shows that there is slightly enhancement in magnetization with co-doping.

  1. Predicting the outcome of a cognitive-behavioral group training for patients with unexplained physical symptoms: a one-year follow-up study

    Directory of Open Access Journals (Sweden)

    Zonneveld Lyonne NL

    2012-10-01

    Full Text Available Abstract Background Although Cognitive-Behavioral Therapy (CBT is effective for Unexplained Physical Symptoms (UPS, some therapists in clinical practice seem to believe that CBT outcome will diminish if psychiatric comorbidity is present. The result is that patients with a psychiatric comorbidity are redirected from treatment for UPS into treatment for mental health problems. To explore whether this selection and allocation are appropriate, we explored whether CBT outcomes in UPS could be predicted by variables assessed at baseline and used in routine-practice assessments. Methods Patients (n=162 with UPS classified as undifferentiated somatoform disorder or chronic pain disorder were followed up until one year after they had attended a CBT group training. The time-points of the follow-up were at the end of CBT (immediate outcome, three months after CBT (short-term outcome, and one year after CBT (long-term outcome. CBT outcome was measured using the Physical Component Summary of the SF-36, which was the primary outcome measure in the randomized controlled trial that studied effectiveness of the CBT group training. Predictors were: 1. psychological symptoms (global severity score of SCL-90, 2. personality-disorder characteristics (sum of DSM-IV axis II criteria confirmed, 3. psychiatric history (past presence of DSM-IV axis I disorders, and 4. health-related quality of life in the mental domain (mental component summary of SF-36. The effect of this predictor set was explored using hierarchical multiple regression analyses into which these predictors had been entered simultaneously, after control for: a. pretreatment primary outcome scores, b. age, c. gender, d. marital status, and e. employment. Results The predictor set was significant only for short-term CBT outcome, where it explained 15% of the variance. A better outcome was predicted by more psychological symptoms, fewer personality-disorder characteristics, the presence of a psychiatric

  2. Thermal, spectroscopic and magnetic properties of the Co xNi1-x(SeO3).2H2O (x = 0, 0.4, 1) phases

    International Nuclear Information System (INIS)

    Larranaga, A.; Mesa, J.L.; Pizarro, J.L.; Pena, A.; Chapman, J.P.; Arriortua, M.I.; Rojo, T.

    2005-01-01

    The Co x Ni 1-x (SeO 3 ).2H 2 O (x = 0, 0.4, 1) family of compounds has been hydrothermally synthesized under autogeneous pressure and characterized by elemental analysis, infrared and UV-vis spectroscopies and thermogravimetric and thermodiffractometric techniques. The crystal structure of Co 0.4 Ni 0.6 (SeO 3 ).2H 2 O has been solved from single-crystal X-ray diffraction data. This phase is isostructural with the M(SeO 3 ).2H 2 O (M = Co and Ni) minerals and crystallizes in the P2 1 /n space group, with a 6.4681(7), b = 8.7816(7), c = 7.5668(7) A, β = 98.927(9) deg and Z = 4. The crystal structure of this series of compounds consists of a three-dimensional framework formed by (SeO 3 ) 2- selenite oxoanions and edge-sharing M 2 O 10 dimeric octahedra in which the metallic cations are coordinated by the oxygens belonging to both the selenite groups and water molecules. The diffuse reflectance spectra show the essential characteristics of Co(II) and Ni(II) cations in slightly distorted octahedral environments. The calculated values of the Dq and Racah (B and C) parameters are those habitually found for the 3d 7 and 3d 8 cations in octahedral coordination. The magnetic measurements indicate the existence of antiferromagnetic interactions in all the compounds. The magnetic exchange pathways involve the metal orbitals from edge-sharing dimeric octahedra and the (SeO 3 ) 2- anions which are linked to the M 2 O 10 polyhedra in three dimensions

  3. Magnetic and structural investigations on La0.6Sr0.4MnO3 nanostructured manganite: Evidence of a ferrimagnetic shell

    International Nuclear Information System (INIS)

    Andrade, V.M.; Caraballo-Vivas, R.J.; Costas-Soares, T.; Pedro, S.S.; Rocco, D.L.; Reis, M.S.; Campos, A.P.C.; Coelho, A.A.

    2014-01-01

    This paper presents the structural and magnetic properties of La 0.6 Sr 0.4 MnO 3 nanoparticles with sizes from 21 to 106 nm, which have been prepared using the sol–gel method. The reduction of the nanoparticles' size tends to broaden the paramagnetic to ferromagnetic transition, as well as to promote magnetic hysteresis and a remarkable change on the magnetic saturation. In order to better understand the magnetic behavior of those nanoparticles, a simple model based on a ferromagnetic core and a ferrimagnetic shell was considered, where the magnetization was described in terms of the standard mean-field Brillouin function. This model matches the experimental data, leading to conclusion the nanoparticles with size <40nm are single magnetic domain. In addition, the output fitting parameters give information on the Landé factor of the core and shell. - Graphical abstract: Core–shell model: The core has a ferromagnetic character, while the shell is ferrimagnetic. Each one has two sub-lattices (Mn 3+ and Mn 4+ ) that interact through a mean-field (see Eq. (6)). Interactions strength and signals are also represented in this figure. In this figure the arrows (or vectors) represent the magnetic moment of ions Mn 3+ (s=2) and Mn 4+ (s=3/2). βλ's describe the ferromagnetic interaction between Mn 4+ ions into the core (βλ co ) and into the shell (βλ sh ), while αλ's represent ferromagnetic interaction between Mn 3+ ions into the core (αλ co ) and into the shell (αλ sh ). The −λ sh and +λ co co are associated to the mean field parameter of interaction between Mn 3+ and Mn 4+ sub-lattices in the shell (ferrimagnetic, negative sign) and core (ferromagnetic, positive sign), respectively. - Highlights: • Evidences of ferromagnetic shell in La 0.6 Sr 0.4 MnO 3 ferromagnetic nanoparticles. • Core(ferromagnetic)–shell(ferromagnetic) model for nanostructured manganite. • Sol–gel method was successfully used to obtain nanostructured

  4. An investigation on hydrogen storage kinetics of nanocrystalline and amorphous Mg2Ni1-xCox (x = 0-0.4) alloy prepared by melt spinning

    International Nuclear Information System (INIS)

    Zhang Yanghuan; Li Baowei; Ren Huipin; Ding Xiaoxia; Liu Xiaogang; Chen Lele

    2011-01-01

    Research highlights: → The investigation of the structures of the Mg 2 Ni 1-x Co x (x = 0, 0.1, 0.2, 0.3, 0.4) alloys indicates that a nanocrystalline and amorphous structure can be obtained in the experiment alloys by melt spinning technology. The substitution of Co for Ni facilitates the glass formation in the Mg 2 Ni-type alloy. And the amorphization degree of the alloys visibly increases with increasing Co content. → Both the melt spinning and Co substitution significantly improve the hydrogen storage kinetics of the alloys. The hydrogen absorption saturation ratio (R t a ) and hydrogen desorption ratio (R t d ) as well as the high rate discharge ability (HRD) increase with rising spinning rate and Co content. The hydrogen diffusion coefficient (D), the Tafel polarization curves and the electrochemical impedance spectra (EIS) measurements show that the electrochemical kinetics notably increases with rising spinning rate and Co content. → Furthermore, all the as-spun alloys, when the spinning rate reaches to 30 m/s, have nearly same hydrogen absorption kinetics, indicating that the hydrogen absorption kinetics of the as-spun alloy is predominately controlled by diffusion ability of hydrogen atoms. - Abstract: In order to improve the hydrogen storage kinetics of the Mg 2 Ni-type alloys, Ni in the alloy was partially substituted by element Co, and melt-spinning technology was used for the preparation of the Mg 2 Ni 1-x Co x (x = 0, 0.1, 0.2, 0.3, 0.4) hydrogen storage alloys. The structures of the as-cast and spun alloys are characterized by XRD, SEM and TEM. The hydrogen absorption and desorption kinetics of the alloys were measured by an automatically controlled Sieverts apparatus. The electrochemical hydrogen storage kinetics of the as-spun alloys is tested by an automatic galvanostatic system. The hydrogen diffusion coefficients in the alloys are calculated by virtue of potential-step method. The electrochemical impedance spectrums (EIS) and the Tafel

  5. Microstructure and Mechanical Properties of Mg-11Li-6Zn-0.6Zr-0.4Ag-0.2Ca-x Y Alloys.

    Science.gov (United States)

    Kim, Yong-Ho; Yoo, Hyo-Sang; Son, Hyeon-Taek

    2018-09-01

    Magnesium and its alloys are potential candidates for many automotive and aerospace applications due to their low density and high specific strength. However, the use of magnesium as wrought products is limited because of its poor workability at ambient temperatures. Mg-Li alloys containing 5-11 wt.% Li exhibit a two-phase structure consisting of a α (hcp) Mg-rich phase and a β (bcc) Li-rich phase. Mg-Li alloys with Li content greater than 11 wt.% exhibit a single-phase structure consisting of only the β phase. In the present study, we studied the effects of Y addition on the microstructure and mechanical properties of Mg-11Li-6Zn-0.6Zr-0.4Ag-0.2Ca based alloys. The melt was maintained at 720 °C for 20 min and poured into a mold. Then, the as-cast Mg alloys were homogenized at 350 °C for 4 h and were hot-extruded onto a 4-mm-thick plate with a reduction ratio of 14:1. The as-cast Mg-11Li-6Zn-0.6Zr-0.4Ag-0.2Ca-xY (x 0, 1, 3, and 5 wt.%) alloys were composed of α-Mg, β-Li, γ-Mg2Zn3Li, I-Mg3YZn6, W-Mg3Y2Zn3, and X-Mg12YZn phases. By increasing the Y content from 0 to 5 wt.%, the composition of the W-Mg3Y2Zn3 phase increased. With increasing Y content, from 0 to 1, 3, and 5 wt.%, the average grain size and ultimate tensile of the as-extruded Mg alloys decreased slightly, from 8.4, to 3.62, 3.56, and 3.44 μm and from 228.92 to 215.57, 187.47, and 161.04 MPa, respectively, at room temperature.

  6. Study on magnetic and hyperfine properties of mechanically milled Ni0.4Zn0.6Fe2O4 nanoparticles

    Science.gov (United States)

    Mondal, R.; Dey, S.; Majumder, S.; Poddar, A.; Dasgupta, P.; Kumar, S.

    2018-02-01

    Herein, we report a comprehensive and comparative study on the structural, microstructural, magnetic and room temperature hyperfine properties of nanosized Ni0.4Zn0.6Fe2O4 having particle sizes 48 (S1), 21 (S2) and 15 (S3) nm synthesized by high energy ball milling method. All the samples are characterized by powder X-ray diffraction, transmission electron microscopic, field emission scanning electron microscopic and Mössbauer spectroscopic techniques. S1, S2 and S3 are single phase nanosized cubic spinel ferrites of Fd-3m symmetry with lattice parameter 8.39, 8.41 and 8.44 Å, respectively, and the samples consist of particles having assorted size and nearly spherical shape. The constituent particles of S1 exhibit multi domain magnetic structure. It shows collective magnetic behavior and clear hysteresis loop at 300 K with coercive field of 140 Oe. On the other hand, S2 and S3 are composed of particles with single domain magnetic configuration and these samples show purely superparamagnetic behavior above their blocking temperature (TB). All the samples display magnetic ordering at low temperature. The values of TB of S2 and S3 are 250 and 185 K, respectively. The values of saturation magnetization (MSAT) of S1, S2 and S3 at 300 K are 47, 42, 30 emu/g, at 150 K are 58, 50, 43 emu/g and at 10 K are 86, 72, 56 emu/g, respectively. The values of coercivity of S1, S2 and S3 at 150 K are 280, 400, 350 Oe and at 10 K are 1600, 2800 and 2000 Oe, respectively. It has been shown that for mechanically activated nanosized Ni0.4Zn0.6Fe2O4 the values of MSAT decrease with the reduction of particle size due to surface spin canting effect, the coercivity is determined by the magnetic domain structure of the particles in the samples, cation distribution can be reliably estimated through infield Mössbauer spectroscopic study and field dependent dc magnetization measurement in conjugation and the particles in S2 are comprised of ferrimagnetically aligned core surrounded by

  7. The Moving Group Targets of the Seeds High-Contrast Imaging Survey of Exoplanets and Disks: Results and Observations from the First Three Years

    Science.gov (United States)

    Brandt, Timothy D.; Kuzuhara, Masayuki; McElwain, Michael W.; Schlieder, Joshua E.; Wisniewski, John P.; Turner, Edwin L.; Carson, J.; Matsuo, T.; Biller, B.; Bonnefoy, M.; hide

    2014-01-01

    We present results from the first three years of observations of moving group (MG) targets in the Strategic Exploration of Exoplanets and Disks with Subaru (SEEDS) high-contrast imaging survey of exoplanets and disks using the Subaru telescope. We achieve typical contrasts of (is) approximately10(exp 5) at 1" and (is) approximately 10(exp 6) beyond 2" around 63 proposed members of nearby kinematic MGs. We review each of the kinematic associations to which our targets belong, concluding that five, beta Pictoris ((is) approximately 20 Myr), AB Doradus ((is) approximately 100 Myr), Columba ((is) approximately 30 Myr), Tucana-Horogium ((is) approximately 30 Myr), and TW Hydrae ((is) approximately 10 Myr), are sufficiently well-defined to constrain the ages of individual targets. Somewhat less than half of our targets are high-probability members of one of these MGs. For all of our targets, we combine proposed MG membership with other age indicators where available, including Ca ii HK emission, X-ray activity, and rotation period, to produce a posterior probability distribution of age. SEEDS observations discovered a substellar companion to one of our targets, kappa And, a late B star. We do not detect any other substellar companions, but do find seven new close binary systems, of which one still needs to be confirmed. A detailed analysis of the statistics of this sample, and of the companion mass constraints given our age probability distributions and exoplanet cooling models, will be presented in a forthcoming paper.

  8. Environmental consequences of the Chernobyl accident and their remediation: Twenty years of experience. Report of the Chernobyl Forum Expert Group 'Environment'

    International Nuclear Information System (INIS)

    2006-01-01

    Chernobyl Forum in 2003. The mission of the Forum was - through a series of managerial and expert meetings - to generate 'authoritative consensual statements' on the environmental consequences and health effects attributable to radiation exposure arising from the accident, as well as to provide advice on environmental remediation and special health care programmes, and to suggest areas in which further research is required. The Forum was created as a contribution to the United Nations' ten year strategy for Chernobyl, launched in 2002 with the publication of Human Consequences of the Chernobyl Nuclear Accident - A Strategy for Recovery. Over a two year period, two groups of experts from 12 countries, including Belarus, the Russian Federation and Ukraine, and from relevant international organizations, assessed the accident's environmental and health consequences. In early 2005 the Expert Group 'Environment', coordinated by the IAEA, and the Expert Group 'Health', coordinated by the WHO, presented their reports for the consideration of the Chernobyl Forum. Both reports were considered and approved by the Forum at its meeting on 18-20 April 2005. This meeting also decided, inter alia, 'to consider the approved reports... as a common position of the Forum members, i.e., of the eight United Nations organizations and the three most affected countries, regarding the environmental and health consequences of the Chernobyl accident, as well as recommended future actions, i.e., as a consensus within the United Nations system.' This report presents the findings and recommendations of the Chernobyl Forum concerning the environmental effects of the Chernobyl accident. The Forum's report considering the health effects of the Chernobyl accident is being published by the WHO

  9. Infiltrated La0.4Sr0.4Fe0.03Ni0.03Ti0.94O3 based anodes for all ceramic and metal supported solid oxide fuel cells

    DEFF Research Database (Denmark)

    Nielsen, Jimmi; Persson, Åsa Helen; Sudireddy, Bhaskar Reddy

    2017-01-01

    performing nanostructured Ni:CGO electrocatalyst coated A site deficient Lanthanum doped Strontium Titanate (La0.4Sr0.4Fe0.03Ni0.03Ti0.94O3) based anodes. The anodes were incorporated into the co-sintered DTU metal supported solid oxide fuel cell design and large sized 12 cm × 12 cm cells were fabricated....... The titanate material showed good processing characteristics and surface wetting properties towards the Ni:CGO electrocatalyst coating. The cell performances were evaluated on single cell level (active area 16 cm2) and a power density at 0.7 V and 700 °C of 0.650 Wcm−2 with a fuel utilization of 31...

  10. Influence of Annealing on Microstructure and Mechanical Properties of Refractory CoCrMoNbTi0.4 High-Entropy Alloy

    Science.gov (United States)

    Zhang, Mina; Zhou, Xianglin; Zhu, Wuzhi; Li, Jinghao

    2018-04-01

    A novel refractory CoCrMoNbTi0.4 high-entropy alloy (HEA) was prepared via vacuum arc melting. After annealing treatment at different temperatures, the microstructure evolution, phase stability, and mechanical properties of the alloy were investigated. The alloy was composed of two primary body-centered cubic structures (BCC1 and BCC2) and a small amount of (Co, Cr)2Nb-type Laves phase under different annealing conditions. The microhardness and compressive strength of the heat-treated alloy was significantly enhanced by the solid-solution strengthening of the BCC phase matrix and newborn Laves phase. Especially, the alloy annealed at 1473 K (1200 °C) achieved the maximum hardness and compressive strength values of 959 ± 2 HV0.5 and 1790 MPa, respectively, owing to the enhanced volume fraction of the dispersed Laves phase. In particular, the HEAs exhibited promising high-temperature mechanical performance, when heated to an elevated temperature of 1473 K (1200 °C), with a compressive fracture strength higher than 580 MPa without fracture at a strain of more than 20 pct. This study suggests that the present refractory HEAs have immense potential for engineering applications as a new class of high-temperature structural materials.

  11. Investigation of Jc-Suppressing Factors in Flat-Rolled Sr0.6K0.4Fe2As2Fe Tapes Via Microstructure Analysis

    KAUST Repository

    Zhang, Xianping

    2015-01-13

    Pnictide superconductors will be very promising for applications if wires with high critical current density Jc can allow reel-to-reel large-scale fabrication at low costs. To understand the mechanism(s) that limited Jc in flat-rolled Sr0.6K0.4Fe2As2(Sr122) tapes, microstructure analysis has been considered the most direct and efficient way. Here, we report on high-resolution microstructure imaging and analysis on Fe-sheathed flat-rolled Sr122 tapes, which have a Jc as high as 2.3 × 104 A/cm2 at 10 T and 4.2 K. The overlapping nature of the Sr122 plates was clearly observed. Transmission electron microscopy/scanning transmission electron microscopy analysis showed that, besides the cracks formed during the fabrication process, the SrO2 phase and cavities caused by the inhomogeneously dispersed Sr and K are the other important factors suppressing Jc. The wetting phase FeAs at the grain boundaries can be partially substituted by Sn in Sn-added samples. Our findings provide insights that pave the way to further enhance the critical current of the rolled 122 tapes up to the practical level.

  12. Oxygen Permeation and Stability Study of (La0.6Ca0.4)0.98(Co0.8Fe0.2)O3-δ Membranes

    DEFF Research Database (Denmark)

    Salehi, Mehdi; Søgaard, Martin; Esposito, Vincenzo

    2017-01-01

    ) was tested. A small decrease in the flux was observed over 48 h in CO2 at 850 °C. SEM examinations of the cross-section of the tested membrane showed that the Ca rich phase in the membrane showed a tendency to migrate to the feed side. Whereas the material shows a CO2 stability superior to that of Sr or Ba......The perovskite-type oxide (La0.6Ca0.4)0.98(Co0.8Fe0.2)O3-δ (LCCF) was investigated for use as oxygen separation membrane. A 25 µm thick dense membrane on a porous LCCF support with a thickness of around 175 µm was prepared by a tape casting and lamination process. The optimum sintering temperature...... of the component was established to be 1050 °C by analysis of microstructures of membranes sintered at different temperatures. Scanning electron microscopy (SEM) examination of cross-sections of the sintered membrane showed that it consisted of two phases, the main phase being enriched in calcium (Ca) and depleted...

  13. Pr0.6Sr0.4CoO3-δ electrocatalyst for solid oxide fuel cell cathode introduced via infiltration

    International Nuclear Information System (INIS)

    Lee, Shiwoo; Miller, Nicholas; Staruch, Margo; Gerdes, Kirk; Jain, Menka; Manivannan, Ayyakkannu

    2011-01-01

    Highlights: → High electrocatalytic activity of Sr-doped PrCoO 3 for oxygen reduction reaction has been demonstrated. → 35-38% of power density enhancement has been achieved for a commercial cell by introducing Sr-doped PrCoO 3 via infiltration. → Fuel cells modified with nano-sized electrocatalyst have shown relatively stable performance for 200 h. → Reliable performance comparison has been realized by utilizing a parallel cell testing system. - Abstract: Effects of infiltrated Pr 0.6 Sr 0.4 CoO 3-δ (PSCo) electrocatalyst on SOFC cathode performance have been studied. Nano-sized particulate catalysts, deposited on surfaces of a composite cathode of Sm 2 O 3 doped CeO 2 (SDC) and La 1-x Sr x Co 1-y Fe y O 3-δ (LSCF), are assumed to effectively widen active sites, or triple phase boundaries, for the oxygen reduction reaction. Area specific resistance of commercially available cells has been decreased by 36-40% with the addition of 23 wt% PSCo electrocatalyst on cathode. Analysis of the impedance spectra demonstrates that PSCo electrocatalyst plays a significant role in dissociation of oxygen molecules and adsorption of oxygen atoms into the cathode. A total of 200 h operation of the cells demonstrated that catalytic activity of PSCo has not been significantly degraded. Simultaneous operations of multiple cells using a parallel-cell testing system have made it possible to compare the performance of several cells with high reliability.

  14. Comparative alteration mineral mapping using visible to shortwave infrared (0.4-2.4 μm) Hyperion, ALI, and ASTER imagery

    Science.gov (United States)

    Hubbard, B.E.; Crowley, J.K.; Zimbelman, D.R.

    2003-01-01

    Advanced Land Imager (ALI), Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER), and Hyperion imaging spectrometer data covering an area in the Central Andes between Volcan Socompa and Salar de Llullaillaco were used to map hydrothermally altered rocks associated with several young volcanic systems. Six ALI channels in the visible and near-infrared wavelength range (0.4-1.0 ??m) were useful for discriminating between ferric-iron alteration minerals based on the spectral shapes of electronic absorption features seen in continuum-removed spectra. Six ASTER channels in the short wavelength infrared (1.0-2.5 ??m) enabled distinctions between clay and sulfate mineral types based on the positions of band minima related to Al-OH vibrational absorption features. Hyperion imagery embedded in the broader image coverage of ALI and ASTER provided essential leverage for calibrating and improving the mapping accuracy of the multispectral data. This capability is especially valuable in remote areas of the earth where available geologic and other ground truth information is limited.

  15. Neutron diffraction study on the crystal and magnetic structures of arc-melted PrFe10.5Mo1.1C0.4 alloy

    International Nuclear Information System (INIS)

    Du Honglin; Xue Yanjie; Zhang Baisheng; Mao Weihua; Yang Jinbo; Cheng Benpei; Yang Yingchang

    1999-01-01

    The crystal and magnetic structures, especially the site occupation of C atoms in the crystal cell of arc-melted PrFe 10.5 Mo 1.1 C 0.4 permanent magnetic alloy have been determined by means of powder neutron diffraction study. Rietveld analysis of the neutron diffraction data indicates that Mo atoms prefers the 8i site, about 76 percent of the C atoms occupy the 8i substitution site, and the other part of C atoms enter the 2b interstitial site. The exact molecular formula should be Pr(Fe 10.575 Mo 1.250 C 0.1.75 C 0.055 . It seems that the site occupation of C atoms in the ThMn 12 -type carbides depends not only on the kind of substitutional transition metals, but also on the components of the substitutional transition metals in the compounds. There are still amount of work to make systematic studies on the relation between them. The effect of C atoms on the magnetic properties is also discussed. (author)

  16. Structural Optimization for Wideband Flexoelectric Energy Harvester Using Bulk Paraelectric Ba0.6Sr0.4TiO3

    Science.gov (United States)

    Kumar, Anuruddh; Chauhan, Aditya; Vaish, Rahul; Kumar, Rajeev; Jain, Satish Chandra

    2018-01-01

    Flexoelectricity is a phenomenon which allows all crystalline dielectric materials to exhibit strain-induced polarization. With recent articles reporting giant flexoelectric coupling coefficients for various ferroelectric materials, this field must be duly investigated for its application merits. In this study, a wide-band linear energy harvesting device has been proposed using Ba0.6Sr0.4TiO3 ceramic. Both structural and material parameters were scrutinized for an optimized approach. Dynamic analysis was performed using finite element modeling to evaluate several important parameters including beam deflection, open circuit voltage and net power output. It was revealed that open circuit voltage and net power output lack correlation. Further, power output lacks a dependency on optimized width ratios, with the highest power output of 0.07 μW being observed for a width ratio of 0.33 closely followed by ratios of 0.2 and 0.5 (˜0.07 μW) each. The resulting power was generated at discrete (resonant) frequencies lacking a broadband structure. A compound design with integrated beams was proposed to overcome this drawback. The finalized design is capable of a maximum power output of >0.04 μW with an operational frequency of 90-110 Hz, thus allowing for a higher power output in a broader frequency range.

  17. Neutron-capture cross-section measurements of Xe136 between 0.4 and 14.8 MeV

    Science.gov (United States)

    Bhike, Megha; Tornow, W.

    2014-03-01

    Fast-neutron-capture cross-section data on Xe136 have been measured with the activation method between 0.4 and 14.8 MeV. The cross section was found to be of the order of 1 mb at the eleven energies investigated. This result is important to interpret potential neutron-induced backgrounds in the enriched xenon observatory and KamLAND-Zen neutrinoless double-β decay searches that use xenon as both source and detector. A high-pressure sphere filled with Xe136 was irradiated with monoenergetic neutrons produced by the reactions 3H(p ,n)3He, 2H(d ,n)3He, and 3H(d ,n)4He. Indium and gold monitor foils were irradiated simultaneously with the Xe136 to determine the incident neutron flux. The activities of the reaction products were measured with high-resolution γ-ray spectroscopy. The present results are compared to predictions from ENDF/B-VII.1 and TENDL-2012.

  18. Magnetic and electrical transport properties of perovskite manganites Pr0.6Sr0.4MxMn1-xO3 (M = Fe, Co, Ni

    Directory of Open Access Journals (Sweden)

    X. S. Ge

    2017-12-01

    Full Text Available Powder samples of ABO3 perovskite manganites with the composition Pr0.6Sr0.4MxMn1-xO3 (M=Fe, Co, or Ni, 0.00≤x≤0.25 were synthesized using the sol-gel method. X-ray diffraction analyses showed that all three sets of samples had a single phase with an orthorhombic structure. The magnetic moment, μobs, of the samples at 10 K, decreased slowly for x≤0.10, whereas μobs decreased rapidly for x≥0.10. The dependences of μobs on the doping level x for the three series of samples were fitted successfully. In the fitting process, Mn, Fe, Co, and Ni cations were assumed to be trivalent, and the magnetic moment directions of Fe3+, Co3+, and Ni3+ cations were assumed to be canted antiferromagnetically coupled with Mn3+ cations. The cant angle ϕ decreased with the increase in x for x≤0.10 for Fe- and Ni-doped (x≤0.15 for Co-doped samples and increased rapidly when x≥0.10 (x≥0.15 for Co-doped samples. These properties are discussed using an oxygen 2p itinerant electron model, which is very similar to the oxygen 2p hole model proposed by Alexandrov et al. [Phys. Rev. Lett. 96, 117003 (2006].

  19. Precious metals in SDSS quasar spectra. II. Tracking the evolution of strong, 0.4 < z < 2.3 Mg II absorbers with thousands of systems

    International Nuclear Information System (INIS)

    Seyffert, Eduardo N.; Simcoe, Robert A.; Cooksey, Kathy L.; O'Meara, John M.; Kao, Melodie M.; Prochaska, J. Xavier

    2013-01-01

    We have performed an analysis of over 34,000 Mg II doublets at 0.36 < z < 2.29 in Sloan Digital Sky Survey (SDSS) Data Release 7 quasar spectra; the catalog, advanced data products, and tools for analysis are publicly available. The catalog was divided into 14 small redshift bins with roughly 2500 doublets in each and from Monte Carlo simulations, we estimate 50% completeness at rest equivalent width W r ≈ 0.8 Å. The equivalent width frequency distribution is described well by an exponential model at all redshifts, and the distribution becomes flatter with increasing redshift, i.e., there are more strong systems relative to weak ones. Direct comparison with previous SDSS Mg II surveys reveals that we recover at least 70% of the doublets in these other catalogs, in addition to detecting thousands of new systems. We discuss how these surveys came by their different results, which qualitatively agree but because of the very small uncertainties, differ by a statistically significant amount. The estimated physical cross section of Mg II-absorbing galaxy halos increased approximately threefold from z = 0.4 to z = 2.3, while the W r ≥ 1 Å absorber line density, dN MgII /dX, grew by roughly 45%. Finally, we explore the different evolution of various absorber populations—damped Lyα absorbers, Lyman limit systems, strong C IV absorbers, and strong and weaker Mg II systems—across cosmic time (0 < z < 6).

  20. Removal of Thin Cirrus Path Radiances in the 0.4-1.0 micron Spectral Region Using the 1.375-micron Strong Water Vapor Absorption Channel

    Science.gov (United States)

    Gao, Bo-Cai; Kaufman, Yoram J.; Han, Wei; Wiscombe, Warren J.

    1998-01-01

    Through analysis of spectral imaging data acquired with the Airborne Visible Infrared Imaging Spectrometer (AVIRIS) from an ER-2 aircraft at 20 km altitude during several field programs, it was found that narrow channels near the center of the strong 1.38-micron water vapor band are very sensitive in detecting thin cirrus clouds. Based on this observation from AVIRIS data, a channel centered at 1.375 microns with a width of 30 nm was selected for the Moderate Resolution Imaging Spectrometer (MODIS) for remote sensing of cirrus clouds from space. The sensitivity of the 1.375-micron MODIS channel to detect thin cirrus clouds during the day time is expected to be one to two orders of magnitude better than the current infrared emission techniques. As a result, a larger fraction of the satellite data will likely be identified as containing cirrus clouds. In order to make better studies of surface reflectance properties, thin cirrus effects must be removed from satellite images. We have developed an empirical approach for removing/correcting thin cirrus effects in the 0.4 - 1.0 micron region using channels near 1.375 microns. This algorithm will be incorporated into the present MODIS atmospheric correction algorithms for ocean color and land applications and will yield improved MODIS atmospheric aerosol, land surface, and ocean color products.

  1. Magnetic studies on Layered solid solution Lix(Ni0.4Mn0.6)2-xO2

    International Nuclear Information System (INIS)

    Nakao, K; Nakamura, T; Yamada, Y; Koshiba, N

    2011-01-01

    Li x (Ni 0.4 Mn 0.6 ) 2-x O 2 (1.09≤x≤1.23) were prepared by the solid-state reaction using LiOH and coprecipitated mixed hydroxide as raw materials. All the compounds have a layered rock-salt structure, and the cation mixing degree (Ni 2+ occupancy in the Li-layer) decreases with an increase in x. From the low-temperature magnetic measurement, they all have negative Weiss temperature and spontaneous magnetization, that is, they are ferromagnetic materials. Both the Curie temperature and the spontaneous magnetization at 4.2K decrease with an increase in x. These magnetic variations are attributed to the lowering of the cation mixing degree: the magnetic interaction network turns to two-dimensional one with the loss of the inert-layer coupling. These situations may be considered semi-quantitatively using the ferromagnetic cluster model. Additionally, the cation mixing degree has an influence on their electrochemical properties such as cycle fading and rate capability.

  2. Grain growth effects on magnetic properties of Ni0.6Zn0.4Fe2O4 material prepared using mechanically alloyed nanoparticles

    Science.gov (United States)

    Syazwan, M. M.; Hapishah, A. N.; Azis, R. S.; Abbas, Z.; Hamidon, M. N.

    2018-06-01

    The effect of grain growth via sintering temperature on some magnetic properties is reported in this research. Ni0.6Zn0.4Fe2O4 nanoparticles were mechanically alloyed for 6 h and the sintering process starting from 600 to 1200 °C with 25 °C increment with only one sample subjected to all sintering scheme. The resulting change in the material was observed after each sintering. Single phase has been formed at 600 °C and above and the intensity peaks increased with sintering temperature as well as crystallinity increment. The morphological studies showed grain size increment as the sintering temperature increased. Moreover, the density increased while the porosity decreased with increasing sintering temperature. The saturation induction, Bs increased with the increased of grain size. On the other hand, the coercivity-vs-grain size plot reveals the critical single-domain-to-multidomain grain size to be about ∼400 nm. The initial permeability, μi value was increased with grain size enhancement. The microstructural grain growth, as exposed for the first time by this research, is shown as a process of multiple activation energy barriers.

  3. Supercontinuum generation covering the entire 0.4-5 µm transmission window in a tapered ultra-high numerical aperture all-solid fluorotellurite fiber

    Science.gov (United States)

    Jia, Z. X.; Yao, C. F.; Jia, S. J.; Wang, F.; Wang, S. B.; Zhao, Z. P.; Liao, M. S.; Qin, G. S.; Hu, L. L.; Ohishi, Y.; Qin, W. P.

    2018-02-01

    Enormous efforts have been made to realize supercontinuum (SC) generation covering the entire transmission window of fiber materials for their wide applications in many fields. Here we demonstrate ultra-broadband SC generation from 400 to 5140 nm in a tapered ultra-high numerical aperture (NA) all-solid fluorotellurite fiber pumped by a 1560 nm mode-locked fiber laser. The fluorotellurite fibers are fabricated using a rod-in-tube method. The core and cladding materials are TeO2-BaF2-Y2O3- and TeO2-modified fluoroaluminate glasses, respectively, which have large refractive index contrast and similar thermal expansion coefficients and softening temperatures. The NA at 3200 nm of the fluorotellurite fiber is about 1.11. Furthermore, tapered fluorotellurite fibers are prepared using an elongation machine. SC generation covering the entire 0.4-5 µm transmission window is achieved in a tapered fluorotellurite fiber for a pumping peak power of ~10.5 kW through synergetic control of dispersion, nonlinearity, confinement loss and other unexpected effects (e.g. the attachment of dust or water to the surface of the fiber core) of the fiber. Our results show that tapered ultra-high NA all-solid soft glass fibers have a potential for generating SC light covering their entire transmission window.

  4. Electrochemical Study of (La0.6Sr0.4)0.99CoO3-δ Thin Film Microelectrodes

    DEFF Research Database (Denmark)

    Kreka, Kosova; Hansen, Karin Vels; Jacobsen, Torben

    layer was deposited a (La0.6Sr0.4)0.99CoO3-δ(LSC40) using pulsed laser deposition (PLD). The thin CGO film (~100 nm) was deposited to avoid any reaction between the YSZ and LSC40 (250 nm). Subsequently, using photolithography and ion beam etching the microelectrode arrays with varying diameters (from...... 100 µm to 5 µm) were produced. Each sample has 4 macro-electrodes which were used as counter-electrode while performing electrochemical measurements. To observe the effect of temperature on the film microstructure and chemistry one sample was heat treated for 16 hours. SEM images, AFM and To......F-SIMS reveal similar behavior for both heat treated and as-deposited films. ToF-SIMS depth profiling reveals a Sr and Co rich surface compared to the bulk of the LSC40 for both samples. The difference between the two samples are in the distribution of common impurities, such as silica. After the heat treatment...

  5. Gamma irradiation up to 109 rads of all silica fibers, comparison with polymer clad silica fibers and solid sample between 0.4 and 2.5 micrometers

    International Nuclear Information System (INIS)

    Boisde, G.; Bonnejean, C.; Perez, J.J.; Neumann, V.; Wurier, B.; Boucher, D.

    1983-05-01

    The effect of γ radiation (Co 60 ) on optical fibers is studied for investigations to remote measurement in irradiating environments. The spectral characteristics of PCS and AS silica fibers, PCS ''Wet'' and AS ''wet'' and ''superwet'' are compared. An automatic computerized system for measurement ''in situ'' is used between 0,4 AND 1,1 micron. Radiation-induced effects are examined at 840nm on PCS, AS with silicone, AS with epoxy (200 and 400/600μm) up to 5.10 8 rads. Samples of ''dry'', ''wet'', ''superwet'' and ''doped fluor'' silica are studied up to 1,3.10 9 rads between 0,3 and 2,5 μm. The photobleaching, the radiation hardening and the breakeage of PCS and AS-silicone after 10 7 rads are recognized. The spectral characteristics of a band at 610-630nm, a spectral deformation at 945nm for ''wet'' fibers and a peak of the radiation-induced attenuation are observed. The kinetic of the 630nm defect in silica fibers and silica samples is also investigated [fr

  6. Langmuir probe measurements and mass spectrometry of plasma plumes generated by laser ablation of La0.4Ca0.6MnO3

    Science.gov (United States)

    Chen, Jikun; Lunney, James G.; Lippert, Thomas; Ojeda-G-P, Alejandro; Stender, Dieter; Schneider, Christof W.; Wokaun, Alexander

    2014-08-01

    The plasma formed in vacuum by UV nanosecond laser ablation of La0.4Ca0.6MnO3 in the fluence range of 0.8 to 1.9 J cm-2 using both Langmuir probe analysis and energy-resolved mass spectrometry has been studied. Mass spectrometry shows that the main positive ion species are Ca+, Mn+, La+, and LaO+. The Ca+ and Mn+ energy distributions are quite broad and lie in the 0-100 eV region, with the average energies increasing with laser fluence. In contrast, the La+ and LaO+ distributions are strongly peaked around 10 eV. The net time-of-arrival signal derived from the measured positive ion energy distributions is broadly consistent with the positive ion signal measured by the Langmuir probe. We also detected a significant number of O- ions with energies in the range of 0 to 10 eV. The Langmuir probe was also used to measure the temporal variation of the electron density and temperature at 6 cm from the ablation target. In the period when O- ions are found at this position, the plasma conditions are consistent with those required for significant negative oxygen ion formation, as revealed by studies on radio frequency excited oxygen plasma.

  7. Evolution of the Stellar Mass–Metallicity Relation. I. Galaxies in the z ∼ 0.4 Cluster Cl0024

    Science.gov (United States)

    Leethochawalit, Nicha; Kirby, Evan N.; Moran, Sean M.; Ellis, Richard S.; Treu, Tommaso

    2018-03-01

    We present the stellar mass–stellar metallicity relationship (MZR) in the galaxy cluster Cl0024+1654 at z ∼ 0.4 using full-spectrum stellar population synthesis modeling of individual quiescent galaxies. The lower limit of our stellar mass range is M * = 109.7 M ⊙, the lowest galaxy mass at which individual stellar metallicity has been measured beyond the local universe. We report a detection of an evolution of the stellar MZR with observed redshift at 0.037 ± 0.007 dex per Gyr, consistent with the predictions from hydrodynamical simulations. Additionally, we find that the evolution of the stellar MZR with observed redshift can be explained by an evolution of the stellar MZR with the formation time of galaxies, i.e., when the single stellar population (SSP)-equivalent ages of galaxies are taken into account. This behavior is consistent with stars forming out of gas that also has an MZR with a normalization that decreases with redshift. Lastly, we find that over the observed mass range, the MZR can be described by a linear function with a shallow slope ([{Fe}/{{H}}]\\propto (0.16+/- 0.03){log}{M}* ). The slope suggests that galaxy feedback, in terms of mass-loading factor, might be mass-independent over the observed mass and redshift range.

  8. Raman characterization of 0.4 nm single-walled carbon nanotubes formed in the channels of AlPO4-5 zeolite single crystals

    International Nuclear Information System (INIS)

    Ye, J T; Zhai, J P; Tang, Z K

    2007-01-01

    In this paper, we review our recent research on ultra-small single-walled carbon nanotubes (SWNTs). Using Raman scattering as a tool, we systematically studied the pyrolysis process of carbon precursors in the channels of AlPO 4 -5 zeolite single crystals, and studied the formation process of the ultra-small SWNTs in the channels. The thermal expansion behaviour and thermal stability of these ultra-small SWNTs, either confined in the AlPO 4 -5 channels or in a freestanding environment, were also studied as a function of temperature. The in situ Raman-scattering measurement under 1 x 10 -5 mbar showed that the (3, 3) and (4, 2) tubes were totally destroyed at a temperature of about 700 K, while the (5, 0) tube can survive to 790 K. The electronic states of the 0.4 nm SWNTs were modulated by means of lithium doping. The continuous electron charge transfer from lithium atoms to the tubes was traced using Raman scattering. With increasing doping level, the radial breathing modes of these tubes shifted to higher frequency because the vibration perpendicular to the tube axis was depressed, in contrast to the conventional softening and downshift of the tangential G-mode vibrations

  9. HYDROGEN CHLORIDE IN DIFFUSE INTERSTELLAR CLOUDS ALONG THE LINE OF SIGHT TO W31C (G10.6-0.4)

    Energy Technology Data Exchange (ETDEWEB)

    Monje, R. R.; Lis, D. C.; Phillips, T. G. [California Institute of Technology, MC 301-17, 1200 E. California Blvd., Pasadena, CA 91125-4700 (United States); Roueff, E. [Observatoire de Paris-Meudon, LUTH UMR 8102, 5 Pl. Jules Janssen, F-92195 Meudon Cedex (France); Gerin, M.; De Luca, M. [LERMA, CNRS, Observatoire de Paris and ENS, F-75231 Paris Cedex (France); Neufeld, D. A. [Department of Physics and Astronomy, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218 (United States); Godard, B., E-mail: raquel@caltech.edu [Departamento de Astrofisica, Centro de Astrobiologia (CAB), INTA-CSIC, Crta. Torrejon km 4, E-28850 Torrejon de Ardoz, Madrid (Spain)

    2013-04-10

    We report the detection of hydrogen chloride, HCl, in diffuse molecular clouds on the line of sight toward the star-forming region W31C (G10.6-0.4). The J = 1-0 lines of the two stable HCl isotopologues, H{sup 35}Cl and H{sup 37}Cl, are observed using the 1b receiver of the Heterodyne Instrument for the Far-Infrared (HIFI) on board the Herschel Space Observatory. The HCl line is detected in absorption, over a wide range of velocities associated with diffuse clouds along the line of sight to W31C. The analysis of the absorption strength yields a total HCl column density of a few 10{sup 13} cm{sup -2}, implying that HCl accounts for {approx}0.6% of the total gas-phase chlorine, which exceeds the theoretical model predictions by a factor of {approx}6. This result is comparable to those obtained from the chemically related species H{sub 2}Cl{sup +} and HCl{sup +}, for which large column densities have also been reported on the same line of sight. The source of discrepancy between models and observations is still unknown; however, the detection of these Cl-bearing molecules provides key constraints for the chlorine chemistry in the diffuse gas.

  10. Influence of rare-earth addition on microstructure and dielectric behavior of Ba0.6Sr0.4TiO3 ceramics

    International Nuclear Information System (INIS)

    Zhang Jingji; Zhai Jiwei; Chou Xiujian; Yao Xi

    2008-01-01

    Ba 0.6 Sr 0.4 TiO 3 (BST) ceramics with 0.5 mol% various trivalent rare-earth additions prepared by a solid-state route are investigated. A strong correlation is observed between the microstructure, dielectric properties and rare-earth element dopant. The results display that comparing with the lattice constants of undoped and doped rare-earth BST, the structure transforms from cubic to tetragonal structure. In addition, the dopant improves the tetragonal distortion with the ionic radius of rare earth decreasing, and then deteriorates it with further decreasing. Large ions rare-earth additions effectively suppress the grain growth of BST. It is found that the temperature-permittivity characteristics for the BSTR (R, namely, rare earth) system could be controlled using various rare-earth elements. Especially, such as Sm, Eu, Gd dopants are effective to satisfy the tunable microwave devices application due to the decrease of permittivity and the improvement of dissipation factors of BST ceramic with the accompanying high-tunability

  11. Structural TEM study of nonpolar a-plane gallium nitride grown on(112_0) 4H-SiC by organometallic vapor phase epitaxy

    Energy Technology Data Exchange (ETDEWEB)

    Zakharov, Dmitri N.; Liliental-Weber, Zuzanna; Wagner, Brian; Reitmeier,Zachary J.; Preble, Edward A.; Davis, Robert F.

    2005-04-05

    Conventional and high resolution electron microscopy havebeen applied for studying lattice defects in nonpolar a-plane GaN grownon a 4H-SiC substrate with an AlN buffer layer. Samples in plan-view andcross-section configurations have been investigated. Basal and prismaticstacking faults together with Frank and Shockley partial dislocationswere found to be the main defects in the GaN layers. High resolutionelectron microscopy in combination with image simulation supported Drum smodel for the prismatic stacking faults. The density of basal stackingfaults was measured to be ~;1.6_106cm-1. The densities of partialdislocations terminating I1 and I2 types of intrinsic basal stackingfaults were ~;4.0_1010cm-2 and ~;0.4_1010cm-2, respectively. The energyof the I2 stacking fault in GaN was estimated to be (40+-4) erg/cm2 basedon the separation of Shockley partial dislocations. To the best of ourknowledge, the theoretically predicted I3 basal stacking fault in GaN wasobserved experimentally for the first time.

  12. Environmental consequences of the Chernobyl accident and their remediation: Twenty years of experience. Report of the UN Chernobyl Forum Expert Group 'Environment' (EGE). Working material

    International Nuclear Information System (INIS)

    2005-08-01

    The purpose of this report is to provide an up-to-date evaluation of the environmental effects of the 26 April 1986 accident at the Chernobyl Nuclear Power Plant. Even though it is now nearly 20 years after the accident and substantial monies have been spent on such evaluations, there are still many conflicting reports and rumours. This joint report has been developed with the full cooperation of the United Nations (UN) family of relevant organisations and with political representatives from the three more affected countries: Ukraine, Belarus, and the Russian Federation. In addition, recognised scientific experts from the three countries and additional international experts provided the basis for the preparation of reports for review by the actual members of the Chernobyl Forum. The - Chernobyl Forum - is a high-level political forum whose suggestion for existence was initiated by the International Atomic Energy Agency (IAEA) in cooperation with the Food and Agriculture Organisation (FAO), the United Nations Office for Coordination of Humanitarian Affairs (OCHA), the United Nations Development Programme (UNDP), the United Nations Environment Programme (UNEP), the United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR), the World Health Organisation (WHO), and the World Bank, as well as the competent authorities of Belarus, the Russian Federation, and Ukraine. The organisational meeting of the Chernobyl Forum was held on 3-5 February 2003, at which time the decision was reached to establish the Forum as an ongoing entity of the above named organisations. Thus, the organisational meeting of the Forum decided to establish the Chernobyl Forum as a series of managerial, expert and public meetings in order to generate authoritative consensual statements on the health effects attributable to radiation exposure arising from the accident and the environmental consequences induced by the released radioactive materials, to provide advice on

  13. Environmental consequences of the Chernobyl accident and their remediation: Twenty years of experience. Report of the UN Chernobyl Forum Expert Group 'Environment' (EGE). Working material

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2005-08-01

    The purpose of this report is to provide an up-to-date evaluation of the environmental effects of the 26 April 1986 accident at the Chernobyl Nuclear Power Plant. Even though it is now nearly 20 years after the accident and substantial monies have been spent on such evaluations, there are still many conflicting reports and rumours. This joint report has been developed with the full cooperation of the United Nations (UN) family of relevant organisations and with political representatives from the three more affected countries: Ukraine, Belarus, and the Russian Federation. In addition, recognised scientific experts from the three countries and additional international experts provided the basis for the preparation of reports for review by the actual members of the Chernobyl Forum. The - Chernobyl Forum - is a high-level political forum whose suggestion for existence was initiated by the International Atomic Energy Agency (IAEA) in cooperation with the Food and Agriculture Organisation (FAO), the United Nations Office for Coordination of Humanitarian Affairs (OCHA), the United Nations Development Programme (UNDP), the United Nations Environment Programme (UNEP), the United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR), the World Health Organisation (WHO), and the World Bank, as well as the competent authorities of Belarus, the Russian Federation, and Ukraine. The organisational meeting of the Chernobyl Forum was held on 3-5 February 2003, at which time the decision was reached to establish the Forum as an ongoing entity of the above named organisations. Thus, the organisational meeting of the Forum decided to establish the Chernobyl Forum as a series of managerial, expert and public meetings in order to generate authoritative consensual statements on the health effects attributable to radiation exposure arising from the accident and the environmental consequences induced by the released radioactive materials, to provide advice on

  14. Studies on structural and magnetic properties of ternary cobalt magnesium zinc (CMZ) Co{sub 0.6-x}Mg{sub x}Zn{sub 0.4} Fe{sub 2}O{sub 4} (x = 0.0, 0.2, 0.4, 0.6) ferrite nanoparticles

    Energy Technology Data Exchange (ETDEWEB)

    Kaur, Manpreet, E-mail: manpreetchem@pau.edu; Jain, Palak; Singh, Mandeep

    2015-07-15

    In this paper we report the variation in structural and magnetic properties of ternary ferrite nanoparticles (NPs) having stoichiometery Co{sub 0.6-x}Mg{sub x}Zn{sub 0.4} Fe{sub 2}O{sub 4} (x = 0.0, 0.2, 0.4, 0.6) and pure spinel ferrites MFe{sub 2}O{sub 4} (M = Mg, Co). NPs with average particle diameter of 25–45 nm were synthesized employing self-propagating oxalyl dihydrazide - metal nitrate combustion method. The products were characterized using X-ray diffraction (XRD), Vibrating sample magnetometer (VSM), Transmission electron microscopy (TEM) and FT-IR spectroscopy. FT-IR spectral analysis revealed two bands centered at 560 and 440 cm{sup −1} for tetrahedral and octahedral metal–oxygen bond stretching. Zinc doping caused red shift in the frequency band of tetrahedral M−O stretching. XRD powder diffraction patterns confirmed the formation of spinel ferrite nanoparticles, expansion of the lattice on zinc doping and enhancement of spinel phase purity in the doped ferrites. Cobalt ferrite displayed lowering of the magnetic parameters on zinc doping which further decreased in ternary ferrites Co{sub 0.6-x}Mg{sub x}Zn{sub 0.4}Fe{sub 2}O{sub 4} on replacing cobalt ions with non-magnetic magnesium ions up to x = 0.4. At x = 0.6 reverse trend was observed and Ms was enhanced. Magnesium zinc ferrite Mg{sub 0.6}Zn{sub 0.4} Fe{sub 2}O{sub 4} with high value of Ms was obtained. Combustion process employed in the present studies serves as a low temperature facile route for the synthesis and structural analysis of ternary doped ferrite nanoparticles. - Highlights: • Ternary doped cobalt magnesium zinc ferrite nanoparticles are synthesized. • FT-IR displayed red shift in tetrahedral stretching band on Zinc doping. • Expansion of lattice and enhancement of spinel phase purity on zinc doping. • The variation in saturation magnetization (Ms) on doping is explained.

  15. Bulling as a group phenomenon: results of “bulling” studies in Finland and Scandinavian countries over the past 20 years (1994-2014

    Directory of Open Access Journals (Sweden)

    Ermolova T.V.

    2015-06-01

    Full Text Available The latest psycho-pedagogical define bullying as a “group process”, and recommend interventions against bullying to be targeted at the peer-group level rather than at individual bullies and victims. Yet, it hasn’t been clarified so far what in the group level should be changed and how. This paper reviews the literature by Finnish, Danish and Sweden scholar on the group involvement in bullying, including insight into the individuals' motives for participation in bullying and the adjustment of victims across different peer contexts. Interventions targeting the peer group are briefly discussed and future directions for research on peer processes in bullying are suggested.

  16. Accelaration of Jamkesda (Regional Health Security Participation and Jamkesda Member Visit based on Age Group Phenomenon in Nganjuk Regency PHC, Year 2012

    Directory of Open Access Journals (Sweden)

    Mugeni Sugiharto

    2015-03-01

    ABSTRACTBackground:Introduction: Jamkesda is pro- poor government policy to fulfill their health care right base on mandate of law. Departemen of Health in Nganjuk Regency run socialization by involving all local power Hence, in 2012 Jamkesda participation would reach highest in East Java. Purpose:This resaerch aimed to identify Jamkesda participation acceleration and Jamkesda member visit based on age group phenomenon in Nganjuk Regency year 2012. Method:Descriptive research with cross sectional design. Population was Nganjuk Regency government Agency with all Jamkesda managing agencies as sample. Analysis unit was institution. Respondents were officials who managed Jamkesda.Result:Jamkesda in Nganjuk Regency was integrate to Sub Divison of Special Service an Health Costing primary task. In 2012 it showed highest Jamkesda participation in East Java. Socialization strengthening in form of social support and advocacy and media use to accelerate local health coverage and to erase Poor Notification Letter to have medication. Medication visit phenomenon was varied in number in every district, the highest was Nganjuk District (11.18%. Women (56.1% who took medication in PHC was higher than men (43,99% particularly those at 15–< 54 years old age group. The commonest disease was hypertension. Conclusion: Participation acceleration through social support and advocacy strategy is able to obtain local public support both formal and non formal for its success. Highest medication visit to PHC was Nganjuk district by women with hypertension as commonest disease they complained. Suggestion:Social support and advocacy socialization strategy can be implemented in other places with similar situation and condition Key words: Jamkesda, Socialization, Social Support, Advocacy

  17. Swedish teenager perceptions of teenage pregnancy, abortion, sexual behavior, and contraceptive habits--a focus group study among 17-year-old female high-school students.

    Science.gov (United States)

    Ekstrand, Maria; Larsson, Margareta; Von Essen, Louise; Tydén, Tanja

    2005-10-01

    Sweden has the highest abortion numbers among the Nordic countries. Since 1995, the abortion rate among teenagers has increased by nearly 50%. We therefore undertook a study where the overall aim was to gain a deeper understanding on which factors female teenagers believe may explain the increasing numbers of teenage abortions. Teenagers' perceptions of teenage pregnancy, abortion, sexual behavior, and contraceptive habits were investigated. Six focus group interviews with 17-year-old Swedish girls were conducted. The interviews were tape-recorded, transcribed verbatim, and analyzed by manifest content analysis. Negative attitudes toward teenage pregnancy and supportive attitudes toward abortion were expressed. Risk-taking behaviors such as negligence in contraceptive use and intercourse under the influence of alcohol were suggested as main reasons behind the increasing numbers of abortions among Swedish teenagers. The contemporary, sexualized, media picture was believed to influence adolescents' sexual behavior, and liberal attitudes toward casual sex were expressed. Girls were perceived as more obliged than boys in taking responsibility for contraceptive compliance and avoidance of pregnancy. The apprehension that hormonal contraceptives cause negative side-effects was widely spread, and the participants were found to have a somewhat limited knowledge of abortion. The majority were unsatisfied with the quality of sexual education provided by the schools. Possible reasons for increased abortion numbers among teenagers in Sweden could be liberal attitudes toward casual sex in combination with negligence in contraceptive use, use of alcohol followed by sexual risk-taking, fear of hormonal contraceptives, and a deterioration of sexual education in the schools.

  18. A 10-year follow-up of a child with mild case of xeroderma pigmentosum complementation group D diagnosed by whole-genome sequencing.

    Science.gov (United States)

    Ono, Ryusuke; Masaki, Taro; Mayca Pozo, Franklin; Nakazawa, Yuka; Swagemakers, Sigrid M A; Nakano, Eiji; Sakai, Wataru; Takeuchi, Seiji; Kanda, Fumio; Ogi, Tomoo; van der Spek, Peter J; Sugasawa, Kaoru; Nishigori, Chikako

    2016-07-01

    Most patients with xeroderma pigmentosum complementation group D (XP-D) from Western countries suffer from neurological symptoms, whereas Japanese patients display only skin manifestations without neurological symptoms. We have previously suggested that these differences in clinical manifestations in XP-D patients are attributed partly to a predominant mutation in ERCC2, and the allele frequency of S541R is highest in Japan. We diagnosed a child with mild case of XP-D by the evaluation of DNA repair activity and whole-genome sequencing, and followed her ten years. Skin cancer, mental retardation, and neurological symptoms were not observed. Her minimal erythema dose was 41 mJ/cm(2) , which was slightly lower than that of healthy Japanese volunteers. The patient's cells showed sixfold hypersensitivity to UV in comparison with normal cells. Post-UV unscheduled DNA synthesis was 20.4%, and post-UV recovery of RNA synthesis was 58% of non-irradiated samples, which was lower than that of normal fibroblasts. Genome sequence analysis indicated that the patient harbored a compound heterozygous mutation of c.1621A>C and c.591_594del, resulting in p.S541R and p.Y197* in ERCC2: then, patient was diagnosed with XP-D. Y197* has not been described before. Her mild skin manifestations might be attributed to the mutational site on her genome and daily strict sun protection. c.1621A>C might be a founder mutation of ERCC2 among Japanese XP-D patients, as it was identified most frequently in Japanese XP-D patients and it has not been found elsewhere outside Japan. © 2016 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

  19. QuickStats: Percentage* of Adults Aged ≥18 Years Who Currently Use E-Cigarettes,† by Sex and Age Group - National Health Interview Survey,§ 2016.

    Science.gov (United States)

    2018-01-05

    In 2016, 3.8% of men and 2.6% of women aged ≥18 years currently used e-cigarettes. Among men, current e-cigarette use decreased with advancing age, from 7.1% among men aged 18-24 years to 4.8% among men aged 25-49 years, 2.6% among men 50-64 years, and 1.1% among men aged ≥65 years. Among women, current e-cigarette use increased between ages 18-24 years (2.3%) and 25-49 years (3.3%) and decreased between ages 50-64 years (3.0%) and ≥65 years (0.9%). A greater percentage of men aged 18-24 years and 25-49 years currently used e-cigarettes compared with women in the same age groups.

  20. Structural, magnetic and magneto-transport properties of monovalent doped manganite Pr{sub 0.55}K{sub 0.05}Sr{sub 0.4}MnO{sub 3}

    Energy Technology Data Exchange (ETDEWEB)

    Thaljaoui, R., E-mail: thaljaoui@gmail.com [Laboratoire de Physique des Matériaux, Faculté des Sciences de Sfax, Université de Sfax, B.P. 1171, 3000 Sfax (Tunisia); Faculty of Physics, Warsaw University of Technology, Koszykowa 75, 00-662 Warsaw (Poland); Department of Chemistry, University of Warsaw, Al. Zwirki i Wigury 101, 02-089 Warsaw (Poland); Boujelben, W. [Laboratoire de Physique des Matériaux, Faculté des Sciences de Sfax, Université de Sfax, B.P. 1171, 3000 Sfax (Tunisia); Pękała, M. [Department of Chemistry, University of Warsaw, Al. Zwirki i Wigury 101, 02-089 Warsaw (Poland); Pękała, K.; Antonowicz, J. [Faculty of Physics, Warsaw University of Technology, Koszykowa 75, 00-662 Warsaw (Poland); Fagnard, J.-F.; Vanderbemden, Ph. [SUPRATECS, Department of Electrical Engineering and Computer Science (B28), University of Liege (Belgium); Dąbrowska, S. [Warsaw University of Technology, Faculty of Materials Science, ul. Wołoska 141, 02-507 Warsaw (Poland); Mucha, J. [Institute of Low Temperature Physics and Structural Research, 50-422 Wrocław (Poland)

    2014-10-25

    Highlights: • Investigation of a new monovalent doped manganite Pr{sub 0.55}K{sub 0.05}Sr{sub 0.4}MnO{sub 3}. • The stability of the sample has been carried by using the DTA analysis. • Magnetic entropy change around 2.26 J kg{sup −1} K{sup −1} resulting RCP value of 70 J/kg for an applied magnetic field of 2 T. • Second order phase transition is confirmed by Arrott plots: A and B Landau coefficients. • Thermal conductivity values are found to be higher for sample with the largest crystallite sizes. - Abstract: Pr{sub 0.55}K{sub 0.05}Sr{sub 0.4}MnO{sub 3} sample have been synthesized using the conventional solid state reaction. Rietveld refinements of the X-ray diffraction patterns at room temperature confirm that the sample is single phase and crystallizes in the orthorhombic structure with Pnma space group; the crystallite size is around 70 nm. The SEM images show that grain size spreads around 1000–1200 nm. DTA analysis does not reveal any clear transition in temperature range studied. The low-temperature DSC indicates that Curie temperature is around 297 K. Magnetization measurements in a magnetic applied field of 0.01 T exhibit a paramagnetic–ferromagnetic transition at the Curie temperature T{sub C} = 303 K. A magnetic entropy change under an applied magnetic field of 2 T is found to be 2.26 J kg{sup −1} K{sup −1}, resulting in a large relative cooling power around 70 J/kg. Electrical resistivity measurements reveal a transition from semiconductor to metallic phase. The thermal conductivity is found to be higher than that reported for undoped and Na doped manganites reported by Thaljaoui et al. (2013)

  1. Porous La0.6Sr0.4CoO3-δ thin film cathodes for large area micro solid oxide fuel cell power generators

    DEFF Research Database (Denmark)

    Garbayo, A.; Esposito, Vincenzo; Sanna, Simone

    2014-01-01

    Porous La0.6Sr0.4CoO3-δ thin films were fabricated by pulsed laser deposition for being used as a cathode for micro solid oxide fuel cell applications as MEMS power generators. Symmetrical La0.6Sr0.4CoO3-δ/ yttria-stabilized zirconia/La0.6Sr0.4CoO3-δ free-standing membranes were fabricated using ...

  2. High transport current superconductivity in powder-in-tube Ba0.6K0.4Fe2As2 tapes at 27 T

    Science.gov (United States)

    Huang, He; Yao, Chao; Dong, Chiheng; Zhang, Xianping; Wang, Dongliang; Cheng, Zhe; Li, Jianqi; Awaji, Satoshi; Wen, Haihu; Ma, Yanwei

    2018-01-01

    The high upper critical field and low anisotropy of iron-based superconductors (IBS) make them particularly attractive for high-field applications, especially for the construction of next-generation nuclear magnetic resonance spectrometers, particle accelerators and high-field magnets. However, for practical use it is essential to make IBS materials into wire and tape conductors with sufficient current carrying capability, which is limited by misaligned grains inside the conductors. Here, based on a simple and low-cost powder-in-tube (PIT) method, we demonstrate a high transport critical current density (J c) reaching 1.5 × 105 A cm-2 (I c = 437 A) at 4.2 K and 10 T in Ba0.6K0.4Fe2As2 (Ba-122) tapes by texturing the grain orientation with optimized hot-press technique. The transport J c measured at 4.2 K under high magnetic fields of 27 T is still on the level of 5.5 × 104 A cm-2. Moreover, at 20 K and 5 T the transport J c is also as high as 5.4 × 104 A cm-2, showing a promising application potential in moderate temperature range which can be reached by liquid hydrogen or cryogenic cooling. All these J c values are the highest ever reported for IBS wires and tapes. The high-performance PIT Ba-122 tapes in this work suggest IBS to be a strong potential competitor of cuprate superconductors for the race of high-field applications in the future.

  3. Galactic conformity and central/satellite quenching, from the satellite profiles of M* galaxies at 0.4 < z < 1.9 in the UKIDSS UDS

    Science.gov (United States)

    Hartley, W. G.; Conselice, C. J.; Mortlock, A.; Foucaud, S.; Simpson, C.

    2015-08-01

    We explore the redshift evolution of a curious correlation between the star formation properties of central galaxies and their satellites (`galactic conformity') at intermediate to high redshift (0.4 9.7, around central galaxies at the characteristic Schechter function mass, M ˜ M*. We fit the radial profiles of satellite number densities with simple power laws, finding slopes in the range -1.1 to -1.4 for mass-selected satellites, and -1.3 to -1.6 for passive satellites. We confirm the tendency for passive satellites to be preferentially located around passive central galaxies at 3σ significance and show that it exists to at least z ˜ 2. Meanwhile, the quenched fraction of satellites around star-forming galaxies is consistent with field galaxies of equal stellar masses. We find no convincing evidence for a redshift-dependent evolution of these trends. One simple interpretation of these results is that only passive central galaxies occupy an environment that is capable of independently shutting off star formation in satellite galaxies. By examining the satellites of higher stellar mass star-forming galaxies (log(M*/M⊙) > 11), we conclude that the origin of galactic conformity is unlikely to be exclusively due to the host dark matter halo mass. A halo-mass-independent correlation could be established by either formation bias or a more physical connection between central and satellite star formation histories. For the latter, we argue that a star formation (or active galactic nucleus) related outburst event from the central galaxy could establish a hot halo environment which is then capable of quenching both central and satellite galaxies.

  4. Exploring the luminosity evolution and stellar mass assembly of 2SLAQ luminous red galaxies between redshifts 0.4 and 0.8

    Science.gov (United States)

    Banerji, Manda; Ferreras, Ignacio; Abdalla, Filipe B.; Hewett, Paul; Lahav, Ofer

    2010-03-01

    We present an analysis of the evolution of 8625 luminous red galaxies (LRGs) between z = 0.4 and 0.8 in the 2dF and Sloan Digital Sky Survey LRG and QSO (2SLAQ) survey. The LRGs are split into redshift bins and the evolution of both the luminosity and stellar mass function with redshift is considered and compared to the assumptions of a passive evolution scenario. We draw attention to several sources of systematic error that could bias the evolutionary predictions made in this paper. While the inferred evolution is found to be relatively unaffected by the exact choice of spectral evolution model used to compute K + e corrections, we conclude that photometric errors could be a source of significant bias in colour-selected samples such as this, in particular when using parametric maximum likelihood based estimators. We find that the evolution of the most massive LRGs is consistent with the assumptions of passive evolution and that the stellar mass assembly of the LRGs is largely complete by z ~ 0.8. Our findings suggest that massive galaxies with stellar masses above 1011Msolar must have undergone merging and star formation processes at a very early stage (z >~ 1). This supports the emerging picture of downsizing in both the star formation as well as the mass assembly of early-type galaxies. Given that our spectroscopic sample covers an unprecedentedly large volume and probes the most massive end of the galaxy mass function, we find that these observational results present a significant challenge for many current models of galaxy formation.

  5. Enhanced magnetoresistance induced by oxygen deficiency in La0.4Ca0.6MnO3-δ oxides

    International Nuclear Information System (INIS)

    Triki, M.; Dhahri, E.; Hlil, E. K.; Garden, J. L.

    2014-01-01

    We report electrical features and magnetoresistance behavior of the oxygen deficient La 0.4 Ca 0.6 MnO 3-δ perovskites (δ = 0, 0.15, and 0.2). These samples will be referred to as S0, S15, and S20, respectively. The dependence of electrical transport on temperature and magnetic field is systematically investigated between 2 K and 400 K in magnetic field ranging up to 5 T. The parent compound shows a stable charge ordering/antiferromagnetic state with a semiconductor-like behavior in all considered temperature range. The variable range hopping and thermally activated hopping models are found to fit well with the electrical resistivity data at low and high temperatures, respectively. Oxygen deficiency tends to weaken the charge ordering and induce ferromagnetism and metallicity at low temperature. Metal insulator transition appears at higher fields for lower oxygen deficit (S15 sample) and without field for the S20 sample. The resistivity data for S15 sample are discussed in the framework of the variable-range hopping model. Abnormal transport properties were observed in the S20 sample, characterized by the double metal-insulator transitions and low minimum behavior. These results are discussed in terms of phenomenological percolation model, based on the phase segregation of ferromagnetic metallic clusters and paramagnetic insulating regions. While the parent compound shows no magnetoresistance, a large magnetoresistance is observed in the deficient samples at low temperature reaching 90% and 75% at 2 T for S15 and S20 samples, respectively. Noticeably, these values reached 98% and 91% at 5 T. The appearance of colossal magnetoresistance is attributed to the spin dependent hopping between spin clusters and/or ferromagnetic domains

  6. NMRON on a mixed halide antiferromagnet, (54Mn)Mn(Cl0.6Br0.4)2.4H2O

    International Nuclear Information System (INIS)

    Chaplin, D.H.; Harker, S.J.; Hutchison, W.D.; Bowden, G.J.

    2000-01-01

    Full text: Recently we reported on the significant gains that can be made in Low Temperature Nuclear Orientation (LTNO) of the magnetically dominant species in an antiferromagnetic single crystal by heterogeneous mixing of the halide ligands. This new approach relies on enhanced nuclear spin lattice relaxation (NSLR) at the magnetic ion, in this case Mn, through broadbanded electronic magnons, in the cooled, single crystal host. Whereas the isomorphous terminal compounds ( 54 Mn)MnCI 2 .4H 2 O and ( 54 Mn)MnBr 2 .4H 2 O, have yielded zero field directional anisotropies of only 5% and 14%, respectively, from the daughter gamma from the long-lived parent 54 Mn, the mixed halides have yielded up to 40% zero field gamma anisotropy at the same base temperature of about 7-8 millikelvin. This improved zero field LTNO provides sufficient sensitivity to enable meaningful NMRON studies of the details of the hyperfine parameters at the Mn site in these mixed halide systems. In this paper we provide the NMRON results for single crystal ( 54 Mn)Mn(CI 0.6 Br 0.4 ) 2 .4H 2 O and compare them with the two terminal compounds which possess surprisingly different NMR responses due to different ratios of magnetic exchange to magnetic anisotropy fields. It is shown that whereas the static magnetic hyperfine field at the Mn nucleus is largely unchanged, and the spin flop field nicely interpolates when compared with the terminal compounds, there are significant differences in the pseudoquadrupolar splittings and sub-resonance linewidths

  7. Influence of phase composition on microstructure and properties of Mg-5Al-0.4Mn-xRE (x = 0, 3 and 5 wt.%) alloys

    International Nuclear Information System (INIS)

    Braszczyńska-Malik, K.N.; Grzybowska, A.

    2016-01-01

    The microstructure and mechanical properties investigations of two AME503 and AME505 experimental alloys in as-cast conditions were presented. The investigated materials were fabricated on the basis of the AM50 commercial magnesium alloy with 3 and 5 wt.% cerium rich mischmetal. In the as-cast condition, both experimental alloys were mainly composed of α-Mg, Al_1_1RE_3 and Al_1_0RE_2Mn_7 intermetallic phases. Additionally, due to non-equilibrium solidification conditions, a small amount of α + γ divorced eutectic and Al_2RE intermetallic phase were revealed. The obtained results also show a significant influence of rare earth elements on Brinell hardness, tensile and compression properties at ambient temperature and especially on creep properties at 473 K. Improved alloy properties with a rise in rare earth elements mass fraction results from an increase in Al_1_1RE_3 phase volume fraction and suppression of α + γ eutectic volume fraction in the alloy microstructure. Additionally, the influence of rare earth elements on the dendrite arm space value was discussed. The presented results also proved the thermal stability of the intermetallic phases during creep testing. - Highlights: • Two different Mg-5Al-0.4Mn alloys containing 3 and 5 wt.% of rare earth elements were fabricated. • Addition of rare earth elements leads to a reduction of dendrite arm spaces. • Mechanical properties depend on the phase composition of the alloys. • The increase of the rare earth elements content causes rise of the creep resistance.

  8. Study on glass-forming ability and hydrogen storage properties of amorphous Mg60Ni30La10−xCox (x = 0, 4) alloys

    International Nuclear Information System (INIS)

    Lv, Peng; Wang, Zhong-min; Zhang, Huai-gang; Balogun, Muhammad-Sadeeq; Ji, Zi-jun; Deng, Jian-qiu; Zhou, Huai-ying

    2013-01-01

    Mg 60 Ni 30 La 10−x Co x (x = 0, 4) amorphous alloys were prepared by rapid solidification, using a melt-spinning technique. X-ray diffraction and differential scanning calorimetry analysis were employed to measure their microstructure, thermal stability and glass-forming ability, and hydrogen storage properties were studied by means of PCTPro2000. Based on differential scanning calorimetry results, their glass-forming ability and thermal stability were investigated by Kissinger method, Lasocka curves and atomic cluster model, respectively. The results indicate that glass-forming ability, thermal properties and hydrogen storage properties in the Mg-rich corner of Mg–Ni–La–Co system alloys were enhanced by Co substitution for La. It can be found that the smaller activation energy (ΔΕ) and frequency factor (υ 0 ), the bigger value of B (glass transition point in Lasocka curves), and higher glass-forming ability of Mg–Ni–La–Co alloys would be followed. In addition, atomic structure parameter (λ), deduced from atomic cluster model is valuable in the design of Mg–Ni–La–Co system alloys with good glass-forming ability. With an increase of Co content from 0 to 4, the hydrogen desorption capacity within 4000 s rises from 2.25 to 2.85 wt.% at 573 K. - Highlights: • Amorphous Mg 60 Ni 30 La 10−x Co x (x = 0 and 4) alloys were produced by melt spinning. • The GFA and hydrogen storage properties were enhanced by Co substitution for La. • With an increase of Co content, the hydrogen desorption capacity rises at 573 K

  9. C_6_0"3"- versus C_6_0"4"- /C_6_0"2"- - synthesis and characterization of five salts containing discrete fullerene anions

    International Nuclear Information System (INIS)

    Boeddinghaus, M. Bele; Klein, Wilhelm; Wahl, Bernhard; Faessler, Thomas F.; Jakes, Peter; Eichel, Ruediger A.

    2014-01-01

    Five new compounds, [Rb(18crown-6)]_3[C_6_0] (1), [Rb(18crown-6)]_6[C_6_0]_2(C_3H_7NO)_2(C_4H_8O)_2 (2), [Rb(benzo18crown-6)]_6[C_6_0]_2(C_2H_8N_2)_5 (3), [Cs(benzo18crown-6)]_3C_6_0(C_2H_8N_2)_2 (4), and [Cs_3(benzo18crown-6)_5]C_6_0(C_2H_8N_2)_(_4_._5_+_x_) (5) were synthesized and characterized by single-crystal X-ray structure determination. All compounds contain discrete C_6_0 anions, which are ordered in 1, 2, and 4, where direct cation-anion contacts occur. The unit cells of 1 and 2 contain two independent fullerides, which coordinate to the rubidium atoms either of two or of four [Rb(18crown-6)] units. Owing to the presence of differently coordinated fullerene units in compounds 1 and 2, a possible disproportionation of C_6_0"3"- into C_6_0"2"- and C_6_0"4"- anions is discussed. In 3 and 4 the C_6_0 anions are coordinated by three Rb and Cs atoms, respectively. In all compounds the average charge of the anion is -3. Magnetic data reveal a doublet spin state for 3. The EPR spectra are discussed for compounds 3 and 5. The role of a dynamic Jahn-Teller distortion is discussed, and we report the first IR spectroscopic data of fullerene trianions, which have been obtained in solution. (Copyright copyright 2014 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

  10. Microstructures and Surface Stabilities of {Ni-0.4C-6Ta- xCr, 0 ≤ x ≤ 50 Wt Pct} Cast Alloys at High Temperature

    Science.gov (United States)

    Berthod, Patrice

    2018-06-01

    Nickel-based cast alloys rich in chromium and reinforced by TaC carbides are potentially very interesting alloys for applications at elevated temperatures. Unfortunately, unlike cobalt-chromium and iron-chromium alloys, it is difficult to obtain exclusively TaC as primary carbides in Ni-Cr alloys. In alloys containing 30 wt pct Cr tantalum, carbides coexist with chromium carbides. The latter tend to weaken the alloy at elevated temperatures because they become rapidly spherical and then quickly lose their reinforcing effect. In this work, we attempted to stabilize TaC as a single carbide phase by testing different chromium contents in the [0, 50 wt pct] range. Six alloys containing 0.4C and 6Ta, weight contents corresponding to equivalent molar contents, were elaborated by foundry, and their as-cast microstructures were characterized. Samples of all alloys were exposed to 1127 °C and 1237 °C for 24 hours to characterize their stabilized microstructures. The surface fractions of chromium carbides and tantalum carbides were measured by image analysis, and their evolutions vs the chromium content were studied. For the chosen C and Ta contents, it appears that obtaining TaC only is possible by decreasing the chromium content to 10 wt pct. At the same time, TaC fractions are unfortunately too low because a large portion of tantalum integrates into the solid solution in the matrix. A second consequence is a critical decrease in oxidation resistance. Other possible methods to stabilize TaC as a single carbide are evocated, such as the simultaneous increase in Ta and decrease in chromium from 30 wt pct Cr.

  11. Hydrogen storage properties of LaMgNi3.6M0.4 (M = Ni, Co, Mn, Cu, Al) alloys

    International Nuclear Information System (INIS)

    Yang, Tai; Zhai, Tingting; Yuan, Zeming; Bu, Wengang; Xu, Sheng; Zhang, Yanghuan

    2014-01-01

    Highlights: • La–Mg–Ni system AB 2 -type alloys were prepared by induction melting. • Structures and lattice parameters were analysed by XRD. • Hydrogen absorption/desorption performances were studied. • Mechanisms of hydrogen absorption capacity fading were investigated. - Abstract: LaMgNi 3.6 M 0.4 (M = Ni, Co, Mn, Cu, Al) alloys were prepared through induction melting process. The phase compositions and crystal structures were characterised via X-ray diffraction (XRD). The hydrogen storage properties, including activation performance, hydrogen absorption capacity, cycle stability, alloy particle pulverisation and plateau pressure, were systemically investigated. Results show that Ni, Co, Mn and Cu substitution alloys exhibit multiphase structures comprising the main phase LaMgNi 4 and the secondary phase LaNi 5 . However, the secondary phase of the Al substitution alloy changes into LaAlNi 4 . The lattice parameters and cell volumes of the LaMgNi 4 phase follow the order Ni < Co < Al < Cu < Mn. Activation is simplified through partial substitution of Ni with Al, Cu and Co. The hydrogen absorption capacities of all of the alloys are approximately 1.7 wt.% at the first activation process; however, they rapidly decrease with increasing cycle number. In addition, the stabilities of hydriding and dehydriding cycles decrease in the order Al > Co > Ni > Cu > Mn. Hydriding processes result in numerous cracks and amorphisation of the LaMgNi 4 phase in the alloys. The p–c isotherms were determined by a Sieverts-type apparatus. Two plateaus were observed for the Ni, Co and Al substitution alloys, whereas only one plateau was found for Mn and Cu. This result was caused by the amorphisation of the LaMgNi 4 phase during the hydriding cycles. Reversible absorption and desorption of hydrogen are difficult to achieve. Substitutions of Ni with Co, Mn, Cu and Al significantly influence the reduction of hysteresis between hydriding and dehydriding

  12. Cyclotron resonance spectroscopy of a high-mobility two-dimensional electron gas from 0.4 to 100 K at high filling factors

    Energy Technology Data Exchange (ETDEWEB)

    Curtis, Jeremy A. [Univ. of Alabama, Birmingham, AL (United States); Tokumoto, Takahisa [Univ. of Alabama, Birmingham, AL (United States); Cherian, Judy G. [Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab); Kuno, J. [Rice Univ., Houston, TX (United States); Reno, John L. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); McGill, Stephen A. [Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab); Karaiskaj, Denis [Univ. of South Florida, Tampa, FL (United States); Hilton, David J. [Univ. of Alabama, Birmingham, AL (United States)

    2015-10-01

    We have studied the cyclotron mobility of a Landau-quantized two-dimensional electron gas as a function of temperature (0.4 --100 K) at a fixed magnetic field (1.25 T) using terahertz time-domain spectroscopy in a sample with a low frequency mobility of μdc = 3.6 x 106 cm2 V-1 s-1 and a carrier concentration of ns = 2 x 106 cm-2. The low temperature mobility in this sample results from both impurity scattering and acoustic deformation potential scattering, with μ$-1\\atop{CR}$ ≈ (2.1 x 105 cm2 V-1 s-1)-1 + (3.8 x 10-8 V sK-1 cm-2 x T)-1 at low temperatures. Above 50 K, the cyclotron oscillations show a strong reduction in both the oscillation amplitude and lifetime that is dominated by the contribution due to polar optical phonons. These results suggest that electron dephasing times as long as ~ 300 ps are possible even at this high lling factor (v = 6:6) in higher mobility samples (> 107 cm2 V-1 s-1) that have lower impurity concentrations and where the cyclotron mobility at this carrier concentration would be limited by acoustic deformation potential scattering.

  13. Theory of Lie groups

    CERN Document Server

    Chevalley, Claude

    2018-01-01

    The standard text on the subject for many years, this introductory treatment covers classical linear groups, topological groups, manifolds, analytic groups, differential calculus of Cartan, and compact Lie groups and their representations. 1946 edition.

  14. Prime Contract Awards Alphabetically by Contractor, by State or Country, and Place, Fiscal Year 1987. Part 11. Kodet Architectural Group-Mantech Field Engineering.

    Science.gov (United States)

    1987-01-01

    8217’ C4J C >)> Cm (0 C’) C- ir40 0 -4-4N (4 0 0 .- .>’ .- . ~ - - C 4NL.4- N04.. (0 M’) C -00)0 N U C -(D tD C ,’ m0 0- r, O N N 0 V I- CNFL O4 .0 U 0...10 0646I 0- -I WN 0 Z-D0 I-C’ C-C’) 01 O 6-0 C’)’ C’) 0 ’-40 0l11 0 0 CD C’)U CC C ) TD N0l 06 N- 0.60 00 00000 on 00 0, C. C 000 00 00 000) _𔃺 -’l) U...W LJ "- C C :34 N m4 1 0 w 4 n-it un w N nN r, v 3- 4bD )n0wt400 040 cCO 0n 00 V cl 00a) C)O0LA m-4 I4 N 0413 4 VMPP,?-0V VN 4 (D W 04 4O(D0) 00 cc -4

  15. Environmental consequences of the Chernobyl accident and their remediation: Twenty years of experience. Report of the Chernobyl Forum Expert Group 'Environment'

    International Nuclear Information System (INIS)

    2008-01-01

    countries were also affected as a result of the atmospheric transfer of radioactive material. These countries also encountered problems in the radiation protection of their populations, but to a lesser extent than the three most affected countries. Although the accident occurred nearly two decades ago, controversy still surrounds the real impact of the disaster. Therefore the IAEA, in cooperation with the Food and Agriculture Organization of the United Nations (FAO), the United Nations Development Programme (UNDP), the United Nations Environment Programme (UNEP), the United Nations Office for the Coordination of Humanitarian Affairs (OCHA), the United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR), the World Health Organization (WHO) and the World Bank, as well as the competent authorities of Belarus, the Russian Federation and Ukraine, established the Chernobyl Forum in 2003. The mission of the Forum was - through a series of managerial and expert meetings - to generate 'authoritative consensual statements' on the environmental consequences and health effects attributable to radiation exposure arising from the accident, as well as to provide advice on environmental remediation and special health care programmes, and to suggest areas in which further research is required. The Forum was created as a contribution to the United Nations' ten year strategy for Chernobyl, launched in 2002 with the publication of Human Consequences of the Chernobyl Nuclear Accident - A Strategy for Recovery. Over a two year period, two groups of experts from 12 countries, including Belarus, the Russian Federation and Ukraine, and from relevant international organizations, assessed the accident's environmental and health consequences. In early 2005 the Expert Group 'Environment', coordinated by the IAEA, and the Expert Group 'Health', coordinated by the WHO, presented their reports for the consideration of the Chernobyl Forum. Both reports were considered and approved by

  16. Grupo terapêutico para tabagistas: resultados após seguimento de dois anos Therapeutic group for smokers: results after two-year follow-up

    Directory of Open Access Journals (Sweden)

    Renata Cruz Soares de Azevedo

    2009-01-01

    service. METHODS: One hundred and seventy one smokers were evaluated for treatment in the Therapeutic Group (TG of the Service of Psychoactive Substances. We evaluated sociodemographic variables, history of smoking, presence of medical comorbidity and psychiatric symptoms, initial and late outcomes (median 25 months, by telephone contact. Frequency analysis and multiple logistic regression analysis were used, with a significance level of 5% for associated factors. RESULTS: Most patients were female (73.4%, married (48%, had basic education (74.6%, were working (57%; 65.2% started to smoke before the age of 15, 63.8% smoked for more than thirty years, 76% already had tried to stop smoking, 46.2% had severe dependence, 72.1% had medical comorbidity and 36% presented psychiatric symptoms. The service was sought by 51%, mainly concerned with health. During treatment, 79.1% stopped smoking. After 25 months, 62% remained abstinent. The variable associated with failure of smoking cessation was the presence of psychiatric symptoms. Variables related to relapse were psychiatric symptoms and lesser attendance at Motivation Group sessions. There was an association between clinical comorbidity and years of smoking and years of inactivity CONCLUSION: This study reinforces the importance of understanding the profile of the subjects to evaluate strategies employed and adequacy of treatment proposed for smokers to improve the rates of smoking cessation and reduce rates of relapse.

  17. Structural investigation and microwave characteristics of (Ba{sub 0.2}La{sub 0.8})Fe{sub 0.2}Mn{sub 0.4}Ti{sub 0.4}O{sub 3} absorbing materials

    Energy Technology Data Exchange (ETDEWEB)

    Manaf, Azwar [Dept. of Physics, Faculty of Mathematics and Natural Sciences, Indonesia of University (Indonesia); Adi, Wisnu Ari, E-mail: dwisnuaa@batan.go.id [Center for Technology of Nuclear Industry Material, National Nuclear Energy Agency (Indonesia)

    2014-03-24

    Synthesis and characterization of (Ba{sub 0.2}La{sub 0.8})Fe{sub 0.2}Mn{sub 0.4}Ti{sub 0.4}O{sub 3} absorbing material by mechanical alloying process has been performed. The absorbing material was prepared by oxide materials, namely BaCO{sub 3}, La{sub 2}O{sub 3}, TiO{sub 2}, Fe{sub 2}O{sub 3}, and MnCO{sub 3}. The mixture was milled for 10 h and then sintered at a temperature of 1000 ° C for 10 h. The refinement results of x-ray diffraction pattern of lanthanum manganite substituted with barium showed that the sample consisted of two phases, namely, La{sub 0.9125}MnO{sub 3} phase which has a structure monoclinic (I12/a1) with lattice parameters a = 5.527(1) Å, b = 5.572(1) Å and c = 7.810(1) Å, α = γ = 90° and β = 89.88(5)°, the unit cell volume of V = 240.57(8) Å{sup 3}, and the atomic density of ρ = 6.238 gr.cm{sup −3}. The microstructure analyses showed that the particle shapes was polygonal with the varied particle sizes of 1 ∼ 3 μm distributed homogeneously on the surface of the samples. The results of the electromagnetic wave absorption curve analysis by using a vector network analyzer (VNA) showed that the sample can absorb microwaves in the frequency range of 8-15 GHz with a very wide absorption bandwidth. It indicates that the as prepared absorber presents potential absorbing property in X and Ku-band. We concluded that the (Ba{sub 0.2}La{sub 0.8})Fe{sub 0.2}Mn{sub 0.4}Ti{sub 0.4}O{sub 3} material can be applied as a candidate absorber material of microwaves or electromagnetic wave.

  18. Performance evaluation of vertical feed fully automated TLD badge reader using 0.8 and 0.4 mm teflon embedded CaSO4:Dy dosimeters

    International Nuclear Information System (INIS)

    Ratna, P.; More, Vinay; Kulkarni, M.S.

    2012-01-01

    The personnel monitoring of more than 80,000 radiation workers in India is at present carried out by semi-automated TLD badge Reader systems (TLDBR-7B) developed by Radiation Safety Systems Division, Bhabha Atomic Research Centre. More than 60 such reader systems are in use in all the personnel monitoring centers in the country. Radiation Safety Systems Division also developed the fully automated TLD badge reader based on a new TLD badge having built-in machine readable ID code (in the form of 16x3 hole pattern). This automated reader is designed with minimum of changes in the electronics and mechanical hardware in the semiautomatic version (TLDBR-7B) so that such semi-automatic readers can be easily upgraded to the fully automated versions by using the new TLD badge with ID code. The reader was capable of reading 50 TLD cards in 90 minutes. Based on the feedback from the users, a new model of frilly automated TLD badge Reader (model VEFFA-10) is designed which is an improved version of the previously reported fully Automated TLD badge reader. This VEFFA-10 PC based Reader incorporates vertical loading of TLD bards having machine readable ID code. In this new reader, a vertical rack, which can hold 100 such cards, is mounted from the right side of the reader system. The TLD card falls into the channel by gravity from where it is taken to the reading position by rack and pinion method. After the readout, the TLD card is dropped in a eject tray. The reader employs hot N 2 gas heating method and the gas flow is controlled by a specially designed digital gas flow meter on the front panel of the reader system. The system design is very compact and simple and card stuck up problem is totally eliminated in the reader system. The reader has a number of self-diagnostic features to ensure a high degree of reliability. This paper reports the performance evaluation of the Reader using 0.4 mm thick Teflon embedded CaSO 4 :Dy TLD cards instead of 0.8 mm cards

  19. The DAFT/FADA survey. I. Photometric redshifts along lines of sight to clusters in the z = [0.4, 0.9] interval

    Science.gov (United States)

    Guennou, L.; Adami, C.; Ulmer, M. P.; Lebrun, V.; Durret, F.; Johnston, D.; Ilbert, O.; Clowe, D.; Gavazzi, R.; Murphy, K.; Schrabback, T.; Allam, S.; Annis, J.; Basa, S.; Benoist, C.; Biviano, A.; Cappi, A.; Kubo, J. M.; Marshall, P.; Mazure, A.; Rostagni, F.; Russeil, D.; Slezak, E.

    2010-11-01

    Context. As a contribution to the understanding of the dark energy concept, the Dark energy American French Team (DAFT, in French FADA) has started a large project to characterize statistically high redshift galaxy clusters, infer cosmological constraints from weak lensing tomography, and understand biases relevant for constraining dark energy and cluster physics in future cluster and cosmological experiments. Aims: The purpose of this paper is to establish the basis of reference for the photo-z determination used in all our subsequent papers, including weak lensing tomography studies. Methods: This project is based on a sample of 91 high redshift (z ≥ 0.4), massive (⪆3 × 1014 M_⊙) clusters with existing HST imaging, for which we are presently performing complementary multi-wavelength imaging. This allows us in particular to estimate spectral types and determine accurate photometric redshifts for galaxies along the lines of sight to the first ten clusters for which all the required data are available down to a limit of IAB = 24./24.5 with the LePhare software. The accuracy in redshift is of the order of 0.05 for the range 0.2 ≤ z ≤ 1.5. Results: We verified that the technique applied to obtain photometric redshifts works well by comparing our results to with previous works. In clusters, photo-z accuracy is degraded for bright absolute magnitudes and for the latest and earliest type galaxies. The photo-z accuracy also only slightly varies as a function of the spectral type for field galaxies. As a consequence, we find evidence for an environmental dependence of the photo-z accuracy, interpreted as the standard used spectral energy distributions being not very well suited to cluster galaxies. Finally, we modeled the LCDCS 0504 mass with the strong arcs detected along this line of sight. Based on observations made with the NASA/ESA Hubble Space Telescope, obtained from the data archive at the Space Telescope Institute and the Space Telescope European

  20. The evolution of the cluster optical galaxy luminosity function between z = 0.4 and 0.9 in the DAFT/FADA survey

    Science.gov (United States)

    Martinet, Nicolas; Durret, Florence; Guennou, Loïc; Adami, Christophe; Biviano, Andrea; Ulmer, Melville P.; Clowe, Douglas; Halliday, Claire; Ilbert, Olivier; Márquez, Isabel; Schirmer, Mischa

    2015-03-01

    Context. There is some disagreement about the abundance of faint galaxies in high-redshift clusters, with contradictory results in the literature arising from studies of the optical galaxy luminosity function (GLF) for small cluster samples. Aims: We compute GLFs for one of the largest medium-to-high-redshift (0.4 ≤ z DAFT/FADA survey in the B,V,R, and I rest-frame bands. We used photometric redshifts computed from BVRIZJ images to constrain galaxy cluster membership. We carried out a detailed estimate of the completeness of our data. We distinguished the red-sequence and blue galaxies using a V - I versus I colour-magnitude diagram. We studied the evolution of these two populations with redshift. We fitted Schechter functions to our stacked GLFs to determine average cluster characteristics. Results: We find that the shapes of our GLFs are similar for the B,V,R, and I bands with a drop at the red GLF faint ends that is more pronounced at high redshift: αred ~ -0.5 at 0.40 ≤ z 0.1 at 0.65 ≤ z < 0.90. The blue GLFs have a steeper faint end (αblue ~ -1.6) than the red GLFs, which appears to be independent of redshift. For the full cluster sample, blue and red GLFs meet at MV = -20, MR = -20.5, and MI = -20.3. A study of how galaxy types evolve with redshift shows that late-type galaxies appear to become early types between z ~ 0.9 and today. Finally, the faint ends of the red GLFs of more massive clusters appear to be richer than less massive clusters, which is more typical of the lower redshift behaviour. Conclusions: Our results indicate that these clusters form at redshifts higher than z = 0.9 from galaxy structures that already have an established red sequence. Late-type galaxies then appear to evolve into early types, enriching the red sequence between this redshift and today. This effect is consistent with the evolution of the faint-end slope of the red sequence and the galaxy type evolution that we find. Finally, faint galaxies accreted from the field

  1. Magnetic tunneling junctions with the Heusler compound Co{sub 2}Cr{sub 0.6}Fe{sub 0.4}Al

    Energy Technology Data Exchange (ETDEWEB)

    Conca Parra, A.

    2007-07-20

    Materials with large spin polarization are required for applications in spintronics devices. For this reason, major research efforts are directed to study the properties of compounds which are expected to be half metals, i.e. materials with 100% spin polarization. Half metals are expected to have a gap in the density of states at the Fermi energy for one spin band while the other spin band is metallic leading to a completely spin polarized current. The ferromagnetic full Heusler alloy Co{sub 2}Cr{sub 0.6}Fe{sub 0.4}Al (CCFA) has attracted great interest in the field of spintronics. The high Tc (800 K) and the expected half metallicity make CCFA a good candidate for applications in spintronic devices such as magnetic tunneling junctions (MTJs). This thesis presents the results of the study of the electronic and structural properties of CCFA thin films. The films were implemented in magnetic tunneling junctions and the tunneling magnetoresistance effect (TMR) was investigated. The main objectives were the measurement of the spin polarisation of the CCFA alloy and to obtain information about its electronic structure. The influence of the deposition conditions on the thin film properties and on the surface crystalline order and their respective influence on the TMR ratio was investigated. Epitaxial CCFA thin films with two alternative growth orientations were deposited on different substrates and buffer layers. An annealing step was used to improve the crystalline properties of the thin films. In the tunneling junctions, Al{sub 2}O{sub 3} was used as a barrier material and Co was chosen as counter electrode. The multilayer systems were patterned in Mesa structures using lithographic techniques. In the framework of the Julliere model, a maximum spin polarisation of 54% at 4K was measured in tunneling junctions with epitaxial CCFA electrodes. A strong influence of the annealing temperature on the TMR ratio was determined. The increase of the TMR ratio could be correlated

  2. THE BURSTY STAR FORMATION HISTORIES OF LOW-MASS GALAXIES AT 0.4 < z < 1 REVEALED BY STAR FORMATION RATES MEASURED FROM H β AND FUV

    Energy Technology Data Exchange (ETDEWEB)

    Guo, Yicheng; Faber, S. M.; Koo, David C.; Krumholz, Mark R.; Barro, Guillermo; Yesuf, Hassen [UCO/Lick Observatory, Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA (United States); Rafelski, Marc; Gardner, Jonathan P.; Pacifici, Camilla [Goddard Space Flight Center, Code 665, Greenbelt, MD (United States); Trump, Jonathan R. [Department of Astronomy and Astrophysics and Institute for Gravitation and the Cosmos, Pennsylvania State University, University Park, PA (United States); Willner, S. P. [Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (United States); Amorín, Ricardo [INAF-Osservatorio Astronomico di Roma, Monte Porzio Catone (Italy); Bell, Eric F. [Department of Astronomy, University of Michigan, Ann Arbor, MI (United States); Gawiser, Eric [Department of Physics and Astronomy, Rutgers University, New Brunswick, NJ (United States); Hathi, Nimish P. [Aix Marseille Université, CNRS, LAM (Laboratoire d’Astrophysique de Marseille) UMR 7326, Marseille (France); Koekemoer, Anton M.; Ravindranath, Swara [Space Telescope Science Institute, Baltimore, MD (United States); Pérez-González, Pablo G. [Departamento de Astrofísica, Facultad de CC. Físicas, Universidad Complutense de Madrid, E-28040 Madrid (Spain); Reddy, Naveen [Department of Physics and Astronomy, University of California, Riverside, CA (United States); Teplitz, Harry I., E-mail: ycguo@ucolick.org [Infrared Processing and Analysis Center, Caltech, Pasadena, CA 91125 (United States)

    2016-12-10

    We investigate the burstiness of star formation histories (SFHs) of galaxies at 0.4 <  z  < 1 by using the ratio of star formation rates (SFRs) measured from H β and FUV (1500 Å) (H β -to-FUV ratio). Our sample contains 164 galaxies down to stellar mass ( M {sub *}) of 10{sup 8.5} M {sub ⊙} in the CANDELS GOODS-N region, where Team Keck Redshift Survey Keck/DEIMOS spectroscopy and Hubble Space Telescope /WFC3 F275W images from CANDELS and Hubble Deep UV Legacy Survey are available. When the ratio of H β - and FUV-derived SFRs is measured, dust extinction correction is negligible (except for very dusty galaxies) with the Calzetti attenuation curve. The H β -to-FUV ratio of our sample increases with M {sub *} and SFR. The median ratio is ∼0.7 at M {sub *} ∼ 10{sup 8.5} M {sub ⊙} (or SFR ∼ 0.5 M {sub ⊙} yr{sup −1}) and increases to ∼1 at M {sub *} ∼ 10{sup 10} M {sub ⊙} (or SFR ∼ 10 M {sub ⊙} yr{sup −1}). At M {sub *} < 10{sup 9.5} M {sub ⊙}, our median H β -to-FUV ratio is lower than that of local galaxies at the same M {sub *}, implying a redshift evolution. Bursty SFH on a timescale of a few tens of megayears on galactic scales provides a plausible explanation for our results, and the importance of the burstiness increases as M {sub *} decreases. Due to sample selection effects, our H β -to-FUV ratio may be an upper limit of the true value of a complete sample, which strengthens our conclusions. Other models, e.g., non-universal initial mass function or stochastic star formation on star cluster scales, are unable to plausibly explain our results.

  3. Hydrogen storage properties of LaMgNi{sub 3.6}M{sub 0.4} (M = Ni, Co, Mn, Cu, Al) alloys

    Energy Technology Data Exchange (ETDEWEB)

    Yang, Tai [Department of Functional Material Research, Central Iron and Steel Research Institute, Beijing 100081 (China); Key Laboratory of Integrated Exploitation of Baiyun Obo Multi-Metal Resources, Inner Mongolia University of Science and Technology, Baotou 014010 (China); Zhai, Tingting; Yuan, Zeming; Bu, Wengang [Department of Functional Material Research, Central Iron and Steel Research Institute, Beijing 100081 (China); Xu, Sheng [Key Laboratory of Integrated Exploitation of Baiyun Obo Multi-Metal Resources, Inner Mongolia University of Science and Technology, Baotou 014010 (China); Zhang, Yanghuan, E-mail: zhangyh59@sina.com [Department of Functional Material Research, Central Iron and Steel Research Institute, Beijing 100081 (China); Key Laboratory of Integrated Exploitation of Baiyun Obo Multi-Metal Resources, Inner Mongolia University of Science and Technology, Baotou 014010 (China)

    2014-12-25

    Highlights: • La–Mg–Ni system AB{sub 2}-type alloys were prepared by induction melting. • Structures and lattice parameters were analysed by XRD. • Hydrogen absorption/desorption performances were studied. • Mechanisms of hydrogen absorption capacity fading were investigated. - Abstract: LaMgNi{sub 3.6}M{sub 0.4} (M = Ni, Co, Mn, Cu, Al) alloys were prepared through induction melting process. The phase compositions and crystal structures were characterised via X-ray diffraction (XRD). The hydrogen storage properties, including activation performance, hydrogen absorption capacity, cycle stability, alloy particle pulverisation and plateau pressure, were systemically investigated. Results show that Ni, Co, Mn and Cu substitution alloys exhibit multiphase structures comprising the main phase LaMgNi{sub 4} and the secondary phase LaNi{sub 5}. However, the secondary phase of the Al substitution alloy changes into LaAlNi{sub 4}. The lattice parameters and cell volumes of the LaMgNi{sub 4} phase follow the order Ni < Co < Al < Cu < Mn. Activation is simplified through partial substitution of Ni with Al, Cu and Co. The hydrogen absorption capacities of all of the alloys are approximately 1.7 wt.% at the first activation process; however, they rapidly decrease with increasing cycle number. In addition, the stabilities of hydriding and dehydriding cycles decrease in the order Al > Co > Ni > Cu > Mn. Hydriding processes result in numerous cracks and amorphisation of the LaMgNi{sub 4} phase in the alloys. The p–c isotherms were determined by a Sieverts-type apparatus. Two plateaus were observed for the Ni, Co and Al substitution alloys, whereas only one plateau was found for Mn and Cu. This result was caused by the amorphisation of the LaMgNi{sub 4} phase during the hydriding cycles. Reversible absorption and desorption of hydrogen are difficult to achieve. Substitutions of Ni with Co, Mn, Cu and Al significantly influence the reduction of hysteresis between

  4. Lego Group

    DEFF Research Database (Denmark)

    Møller Larsen, Marcus; Pedersen, Torben; Slepniov, Dmitrij

    2010-01-01

    The last years’ rather adventurous journey from 2004 to 2009 had taught the fifth-largest toy-maker in the world - the LEGO Group - the importance of managing the global supply chain effectively. In order to survive the largest internal financial crisis in its roughly 70 years of existence......, the management had, among many initiatives, decided to offshore and outsource a major chunk of its production to Flextronics. In this pursuit of rapid cost-cutting sourcing ad